twellington@chromium.org finkm@chromium.org Actions taken from the new tab page on Android. These actions may navigate away from the NTP (e.g. searching in the omnibox or opening a bookmark), but can also happen without navigating away from the NTP (e.g. opening a content suggestion in a new tab). justincohen@chromium.org gambard@chromium.org Actions taken by users from the new tab page on iOS. These actions may navigate away from the NTP (e.g. searching in the omnibox or opening a bookmark), but can also happen without navigating away from the NTP (e.g. opening a bookmark in a new tab). Please list the metric's owners. Add more owner tags as needed. Histogram for the source of app page drags. For any succesful drop onto an apps pane of the NTP, this logs where the drag originated. hanxi@chromium.org xinyiji@chromium.org Records total impressions of a NTP showing as the home surface, including at startup when users haven't used Chrome for 8 hours and via back operations. Only records true if shows. This histogram is recorded on tablets only. hanxi@chromium.org xinyiji@chromium.org Records impressions of a NTP is showing as the home surface at a cold or warm startup when users haven't used Chrome for 8 hours, and only records true if shows. This histogram is recorded on tablets only. danpeng@google.com pauladedeji@google.com chrome-desktop-ntp@google.com Records the type of background image that is set. Only recorded once per NTP. danpeng@google.com tiborg@chromium.org yyushkina@chromium.org chrome-desktop-ntp@google.com The time it took until a request from the New Tab Page for Backdrop Collections was served. pauladedeji@google.com danpeng@google.com chrome-desktop-ntp@google.com Records image's type when an error is detected via its URL headers. Logged every time Chrome encounters an error when verifying background images. danpeng@google.com pauladedeji@google.com chrome-desktop-ntp@google.com The time it takes to download an image's URL headers. Logged every time Chrome encounters an error when verifying background images. danpeng@google.com pauladedeji@google.com chrome-desktop-ntp@google.com Records the HTTP response status code of New Tab Page image URL header requests. Logged every time Chrome encounters an error when verifying background images. tiborg@chromium.org pauladedeji@google.com chrome-desktop-ntp@google.com The time it took until a request from the New Tab Page for Backdrop Images was served. meiliang@chromium.org yuezhanggg@chromium.org chrome-shopping@google.com Logged when discount is encoded successfully into the navigation url. This histogram always logs a 1 and this value has no meaning other than this occurence happended. Only logged on the 1P NTP. Note that even if the user has Google as their default search engine, Incognito and Guest mode NTPs are not considered 1P and don't log this histogram. wychen@chromium.org yuezhanggg@chromium.org chrome-shopping@google.com Logged when the cart module is created. The value is equal to the initial number of carts within the module (could be zero). yuezhanggg@chromium.org chrome-shopping@google.com Logged when the cart module is created and is recorded once for every cart. It records the number of product images in this cart (could be zero). This is not logged when welcome surface is showing. Only logged on the 1P NTP. Note that even if the user has Google as their default search engine, Incognito and Guest mode NTPs are not considered 1P and don't log this histogram. wychen@chromium.org yuezhanggg@chromium.org chrome-shopping@google.com Logged when a user clicks on a cart in the cart module. The value is equal to the index of the cart. meiliang@chromium.org yuezhanggg@chromium.org chrome-shopping@google.com Logged when a user clicks on a cart in the cart module. It records whether the clicked cart has a discount or not. Only logged on the 1P NTP. Note that even if the user has Google as their default search engine, Incognito and Guest mode NTPs are not considered 1P and don't log this histogram. meiliang@chromium.org yuezhanggg@chromium.org chrome-shopping@google.com Records the discount data associated with the cart module. Logged when the chrome cart module makes a data request to a Chrome-external backend. Only logged on the 1P NTP. Note that even if the user has Google as their default search engine, Incognito and Guest mode NTPs are not considered 1P and don't log this histogram. meiliang@chromium.org yuezhanggg@chromium.org chrome-shopping@google.com Logged when the cart module is created and if there is at least one abandoned cart. It records the index of the discounted cart within the cart module. Only logged on the 1P NTP. Note that even if the user has Google as their default search engine, Incognito and Guest mode NTPs are not considered 1P and don't log this histogram. meiliang@chromium.org yuezhanggg@chromium.org chrome-shopping@google.com Logged every time the consent for Rule-based Discount shows in the cart module. We only show the consent when there are abandoned carts from partner merchants. This histogram always logs a 1 and this value has no meaning other than that an occurrence happended. Only logged on the 1P NTP. Note that even if the user has Google as their default search engine, Incognito and Guest mode NTPs are not considered 1P and don't log this histogram. yuezhanggg@chromium.org wychen@chromium.org chrome-shopping@google.com Logged when the cart module is created and if there is at least one abandoned cart. "Accept" and "Decline" to record interaction result for users who have acted on the consent; "IGNORED" for users who have seen the consent before but never acted on it, and the consent is showing now; "No show" for users who have seen the consent before but never acted on it, and the consent is not showing now; "Never shown" for users who have never seen the consent. Only logged on the 1P NTP. Note that even if the user has Google as their default search engine, Incognito and Guest mode NTPs are not considered 1P and don't log this histogram. meiliang@chromium.org chrome-shopping@google.com Logged when the cart module is created and if there is at least one abandoned cart. It {ConsentState}. Only logged on the 1P NTP. Note that even if the user has Google as their default search engine, Incognito and Guest mode NTPs are not considered 1P and don't log this histogram. meiliang@chromium.org yuezhanggg@chromium.org chrome-shopping@google.com Logged when the cart module is created and if there is at least one abandoned cart. It records the number of carts with discount (could be zero). Only logged on the 1P NTP. Note that even if the user has Google as their default search engine, Incognito and Guest mode NTPs are not considered 1P and don't log this histogram. meiliang@chromium.org yuezhanggg@chromium.org chrome-shopping@google.com Logged when the cart module is created. It records the number of carts without discount (could be zero). Only logged on the 1P NTP. Note that even if the user has Google as their default search engine, Incognito and Guest mode NTPs are not considered 1P and don't log this histogram. danpeng@google.com pauladedeji@google.com chrome-desktop-ntp@google.com Logs where a user opened the Chrome Web Store link from in Customize Chrome. Only logged on the 1P NTP. Note that even if the user has Google as their default search engine, Incognito and Guest mode NTPs are not considered 1P and don't log this histogram. tiborg@chromium.org yyushkina@chromium.org chrome-desktop-ntp@google.com Logged when the NTP was clicked. Only logged on the 1P NTP. Be aware that this may undercount clicks on nested OGB iframes. Note that even if the user has Google as their default search engine, Incognito and Guest mode NTPs are not considered 1P and don't log this histogram. danpeng@google.com pauladedeji@google.com chrome-desktop-ntp@google.com The collection id of user's background image on the NTP. Only recorded once per NTP. Note that even if the user has Google as their default search engine, Incognito and Guest mode NTPs are not considered 1P and don't log this histogram. danpeng@google.com tiborg@chromium.org chrome-desktop-ntp@google.com Records the concrete page loaded when navigating to chrome://newtab. Recorded on every NTP load. freedjm@chromium.org feed@chromium.org Android: Whether article suggestions on New Tab Page are set visible by user on startup and when the visibility is changed. freedjm@chromium.org feed@chromium.org Android: The position of the For-You card on the NTP, that is clicked through to the host website of the content. We track the position the card had in the list when it was first seen by the user. This tracked position can be different from the position observed by the user, e.g. when the user dismissed some suggestions from the list or requested more that got inserted in the middle of the feed. iOS: Reported per click on card in the feed. Does not include position information and thus can only be used as a total count of clicks. freedjm@chromium.org feed@chromium.org Android: The position of a For-You card that was shown on the NTP. A card is considered shown when at least 2/3 of its height is visible on the screen. For each card, at most one impression is recorded per NTP instance. We track the position the card had in the list when it was first seen by the user. This tracked position can be different from the position observed by the user, e.g. when the user dismissed some suggestions from the list or requested more that got inserted in the middle of the feed. tmartino@chromium.org chrome-creation@google.com Tracks the outcome of Probabilistic Cryptid Rendering (succeeded, failed, or was disabled because preconditions were not met). Last logged in M86. Removed 2022-10. dbeam@chromium.org yyushkina@chromium.org chrome-analysis-team@google.com Customization actions performed by the user on the New Tab Page; logged as each interaction occurs. This may indicate popularity of a particular customization type. This histogram is of special interest to the chrome-analysis-team@. Do not change its semantics or retire it without talking to them first. tiborg@chromium.org pauladedeji@google.com chrome-desktop-ntp@google.com Captures the actions performed when configuring a 'Chrome background' image on the New Tab Page. Since most actions are sequential, this may indicate steps in the configuration process where users drop off. pauladedeji@google.com danpeng@google.com chrome-desktop-ntp@google.com Captures calls to open Customize Chrome on the NTP. Calls can be made to open Customize Chrome while it is already open. Opening Customize Chrome from inside the side panel is tracked by "SidePanel.CustomizeChrome.ShowTriggered". tiborg@chromium.org yyushkina@chromium.org chrome-desktop-ntp@google.com The New Tab Page features that have been customized by the user; logged per NTP load. tiborg@chromium.org yyushkina@chromium.org chrome-desktop-ntp@google.com The New Tab Page shortcut settings that can be customized by the user, including shortcut type (i.e. most visited vs custom links) and visibility; logged per NTP load. tiborg@chromium.org pauladedeji@google.com chrome-desktop-ntp@google.com Captures the actions performed when uploading a local image as the background on the New Tab Page. Since most actions are sequential, this may indicate steps in the configuration process where users drop off. tiborg@chromium.org yyushkina@chromium.org chrome-desktop-ntp@google.com Captures the actions performed when configuring shortcuts on the New Tab Page. tiborg@chromium.org aee@chromium.org andrevincent@google.com Logged when a user clicks on a file within the Drive Module. The index is equal to the index of the file. tiborg@chromium.org chrome-desktop-ntp@google.com Logs the number of files returned by ItemSuggest. Logged every time the Drive module successfully processed an ItemSuggest response. tiborg@chromium.org chrome-desktop-ntp@google.com Logs the result of a request to the ItemSuggest API. Logged every time the Drive module makes an ItemSuggest request. hanxi@chromium.org xinyiji@chromium.org Records the reason of why failed to show a home surface UI on the chosen NTP. Logged in cold or warm startup when failed to show the home surface UI. This histogram is recorded on tablets only. hanxi@chromium.org ssid@chromium.org Logs the result from segmentation platform that determines whether the user is a Feed active user or a non-Feed user. Recorded three times when a new tab page is shown and Feed position (target) experiment is enabled. tiborg@chromium.org romanarora@chromium.org chrome-desktop-ntp@google.com Logs whether Chrome has valid user credentials for the profile the NTP is loading in. Logged when the NTP starts loading. Only logged on the 1P NTP. Note that even if the user has Google as their default search engine, Incognito and Guest mode NTPs are not considered 1P and don't log this histogram. danpeng@google.com tiborg@chromium.org chrome-desktop-ntp@google.com Height of the NTP viewport in CSS pixels. Logged when the NTP loads. Only logged on the 1P NTP. Note that even if the user has Google as their default search engine, Incognito and Guest mode NTPs are not considered 1P and don't log this histogram. yuezhanggg@chromium.org romanarora@chromium.org tiborg@chromium.org chrome-desktop-ntp@google.com Logs the association status of every abandoned cart to history clusters when history clusters are loaded and ranked to be shown in the NTP History Cluster Module. Logged at module UI creation time when determining if there is necessary data to display the module. Only logged on the 1P NTP and when the history clusters module is enabled. romanarora@chromium.org chrome-desktop-ntp@google.com Records the dismissal reason for a NTP History Clusters module instance. Logged when the user interacts with a module instance dismissal action button. Only logged on the 1P NTP when the history clusters module is enabled. romanarora@chromium.org tiborg@chromium.org chrome-desktop-ntp@google.com Records the layout selected and displayed for the NTP History Clusters module. Logged at module UI creation time when determining if there is necessary data to display the module. Only logged on the 1P NTP when the history clusters module is enabled. yuezhanggg@chromium.org tiborg@chromium.org chrome-desktop-ntp@google.com Logs whether there is at least one ChromeCart related to the top cluster. Being related is defined as whether there is a ChromeCart for the domain of any visit in this cluster, Only logged on the 1P NTP when both the history clusters module and ChromeCart is enabled. sophiechang@chromium.org tiborg@chromium.org chrome-desktop-ntp@google.com Logs whether there is at least one cluster that can be shown in the history clusters module that matches the desired filtering criteria configurable via Finch. Only logged on the 1P NTP and the history clusters module is enabled. yuezhanggg@chromium.org chrome-shopping@google.com chrome-desktop-ntp@google.com Logs whether the Cluster showing in the module contains a visible discount, i.e. at least one visible visit has an associated discount. Logged when the NewTabPage is rendering the enabled modules. Only logged in 1P NTP with the history clusters module and Discount feature enabled. romanarora@chromium.org tiborg@chromium.org chrome-desktop-ntp@google.com Logs whether loading an image for a quests tile succeeded or failed (true for success and false for failure). This is determined by whether or not we get a URL back from the ImageService for a visit that we expected to have an image for. Only logged in 1P NTP with the history clusters module enabled. romanarora@chromium.org tiborg@chromium.org chrome-desktop-ntp@google.com Logs the reason why the last candidate cluster of a list of of ineligible candidate clusters was identified as such, resulting in the module not being displayed. Logged when the NewTabPage is rendering the enabled modules. Only logged on the 1P NTP and the history clusters module is enabled. romanarora@chromium.org tiborg@chromium.org chrome-desktop-ntp@google.com Records the element type that was activated by the user on the NTP history clusters module. Logged when a user clicks on an actionable element of the module, such as a tile or button. Only logged on the 1P NTP when the history clusters module is enabled. romanarora@chromium.org tiborg@chromium.org chrome-desktop-ntp@google.com Logs the overall image absence or presence on the visit tiles displayed in the NTP history clusters module. Logged at page unload time. Only logged on the 1P NTP and when the history clusters module is enabled. romanarora@chromium.org tiborg@chromium.org chrome-desktop-ntp@google.com Logs the index of a clicked URL visit or suggestion tile for a given displayed layout of the NTP history clusters module. Logged on clicking a tile element of the module. Only logged on the 1P NTP and when the history clusters module is enabled. sophiechang@chromium.org tiborg@chromium.org chrome-desktop-ntp@google.com Logs the number of clusters that match the desired filtering criteria configurable via Finch for the history clusters module. Only logged on the 1P NTP and the history clusters module is enabled. romanarora@chromium.org tiborg@chromium.org chrome-desktop-ntp@google.com Logs the number of related searches present in the candidate cluster that might be rendered by the NTP history clusters module. Logged at module UI creation time when determining if there is necessary data to display the module. Only logged on the 1P NTP and when the history clusters module is enabled. romanarora@chromium.org tiborg@chromium.org chrome-desktop-ntp@google.com Logs the number of URL visits present in the candidate cluster that might be rendered by the NTP history clusters module. Logged at module UI creation time when determining if there is necessary data to display the module. Only logged on the 1P NTP and when the history clusters module is enabled. danpeng@google.com pauladedeji@google.com chrome-desktop-ntp@google.com The elapsed time between when {ImageType} is requested by the NTP frontend and when it is loaded. NewTabPage.Images.ShownTime.BackgroundImage is only logged when the NTP loads with a background image. It is recorded once per NTP. Other {ImageType} metrics are logged every time that {ImageType} is shown. jkrcal@chromium.org Android: Percentage of how much in browsing is the UI language of Chrome used compared to overall use of the two top languages that are reported to Chrome content suggestion server. nguyenbryan@google.com yowakita@google.com bbonnet@google.com chrome-desktop-ntp@google.com Actions that take place on the Lens upload dialog on the new tab page. These may indicate user actions (interactions with the form) or the results of user actions (e.g. successful submission or showing an error message). Only logged on the 1P NTP. Note that even if the user has Google as their default search engine, Incognito and Guest mode NTPs are not considered 1P and don't log this histogram. nguyenbryan@google.com yowakita@google.com bbonnet@google.com chrome-desktop-ntp@google.com Errors that occur during use of the Lens upload dialog on the new tab page.These may indicate user error (e.g. an unusable file or URL) or external errors (e.g. a network error). Only logged on the 1P NTP. Note that even if the user has Google as their default search engine, Incognito and Guest mode NTPs are not considered 1P and don't log this histogram. tiborg@chromium.org yyushkina@chromium.org chrome-desktop-ntp@google.com Histogram of the time, in milliseconds, it took for the NTP to load all of its tiles since navigation start. tiborg@chromium.org yyushkina@chromium.org chrome-analysis-team@google.com chrome-desktop-ntp@google.com The number of clicks on the static/call-to-action/animated logo on the NTP. This histogram is of special interest to the chrome-analysis-team@. Do not change its semantics or retire it without talking to them first. tiborg@chromium.org danpeng@google.com chrome-desktop-ntp@google.com Outcome of downloading search provider's logos. It measures whether download/parsing is successful, revalidation and parsing work properly, etc. tiborg@chromium.org romanarora@chromium.org chrome-desktop-ntp@google.com The amount of time it took to download the static logo. This includes requests where there was no logo, or where an existing logo was revalidated (so no new image data was downloaded), but it does not include failed requests. tiborg@chromium.org danpeng@google.com chrome-desktop-ntp@google.com A logo image (static or CTA) was downloaded. Recorded only when the image was downloaded and decoded without errors. tiborg@chromium.org danpeng@google.com chrome-desktop-ntp@google.com The number of static logos and animated logos shown to users. Note that the base version of this histogram is recorded both for logos from the cache and for fresh logos, so it can be recorded twice per NTP impression. tiborg@chromium.org danpeng@google.com chrome-desktop-ntp@google.com The amount of time between opening an NTP and the logo appearing. Only recorded when there is a logo, and only recorded once per NTP. tiborg@chromium.org chrome-desktop-ntp@google.com Records the time until the top-level ntp-app Custom Element's |ready| callback is called. The intention is to measure how quickly the contents of new_tab_page.rollup.js (main JS bundle) are rendered. Removed in April 2023. fserb@chromium.org zmin@chromium.org Record the network status when a new tab page is opened. True if user is online and false for offline. hanxi@chromium.org xinyiji@chromium.org Record the total count of clicks on different modules of the New tab page. For most visited tiles: is recorded when 1) user clicks on most visited tiles; 2) long press on most visited tiles to open in a new tab or open in a new tab in group or a new incognito tab or to download the link. This is consistent with MobileNTPMostVisited. For feeds: is recorded when 1) user clicks on feeds; 2) long press on feeds to open in a new tab or open in a new incognito tab or check about this source and topic; 3) click the learn more button on the top of the feeds section. For omnibox: is recorded every time when user uses Omnibox or voice search on Omnibox to navigate. This is consistent with MobileOmniboxUse. For tab switcher button: is recorded every time when user clicks on the tab switcher button. For home button: is recorded when user clicks on the home button. For profile button: is recorded when user clicks on the profile button. For doodle logo: is recorded every time when user clicks on the doodle and navigates to another website. For menu button: is recorded when user clicks on the menu button. The histogram is logged on New tab page and is Android-only. hanxi@chromium.org xinyiji@chromium.org Record the total count of long clicks on different modules of the New tab page. For home button: is recorded when user long presses on home button to edit homepage. The histogram is logged on New tab page and is Android-only. danpeng@google.com tiborg@chromium.org yyushkina@chromium.org chrome-desktop-ntp@google.com Records hashes associated with NTP modules. Logged when an NTP module makes a data request to a Chrome-external backend. Only logged on the 1P NTP. Note that even if the user has Google as their default search engine, Incognito and Guest mode NTPs are not considered 1P and don't log this histogram. romanarora@chromium.org tiborg@chromium.org chrome-desktop-ntp@google.com Logged when a module was disabled by {Interaction}. Only logged on the 1P NTP. Note: If the user has Google as their default search engine, Incognito and Guest mode NTPs are not considered 1P and don't log this histogram. Note: NewTabPage.Modules.Disabled.Customize is not recorded for pre-M116 users of Panorama. danpeng@google.com tiborg@chromium.org chrome-desktop-ntp@google.com Records the dismissed modules. This is recorded when the user explicitly dismisses a module via the module remove button on the New Tab Page. Every dismissal emits a 1 which has no inherent meaning aside from a dismissal occurred. danpeng@google.com tiborg@chromium.org chrome-desktop-ntp@google.com Logs for each NTP module whether it was enabled after the NTP has instantiated the modules. Only logged on the 1P NTP. Note that even if the user has Google as their default search engine, Incognito and Guest mode NTPs are not considered 1P and don't log this histogram. Note: In M110, the output of the metric was accidentally modified to record all modules whose descriptors where loaded. This was subsequently corrected in M114. romanarora@chromium.org tiborg@chromium.org chrome-desktop-ntp@google.com Logged when a module was enabled by {Interaction}. Only logged on the 1P NTP. Note: If the user has Google as their default search engine, Incognito and Guest mode NTPs are not considered 1P and don't log this histogram. Note: NewTabPage.Modules.Enabled.Customize is not recorded for pre-M116 users of Panorama. danpeng@google.com pauladedeji@google.com chrome-desktop-ntp@google.com Logs how many time a user saw the FRE when they opt in. Only logged on the 1P NTP. Note that even if the user has Google as their default search engine, Incognito and Guest mode NTPs are not considered 1P and don't log this histogram. danpeng@google.com pauladedeji@google.com chrome-desktop-ntp@google.com Logs when user is opted in to FRE without taking action. Only logged on the 1P NTP. Note that even if the user has Google as their default search engine, Incognito and Guest mode NTPs are not considered 1P and don't log this histogram. danpeng@google.com pauladedeji@google.com chrome-desktop-ntp@google.com Logs if Modular NTP Desktop v1 First Run Experience is set to be visible and on user's screen. Only logged on the 1P NTP. Note that even if the user has Google as their default search engine, Incognito and Guest mode NTPs are not considered 1P and don't log this histogram. danpeng@google.com pauladedeji@google.com chrome-desktop-ntp@google.com Logs if Modular NTP Desktop v1 First Run Experience is set to be visible whether or not it is on the user's screen. Only logged on the 1P NTP. Note that even if the user has Google as their default search engine, Incognito and Guest mode NTPs are not considered 1P and don't log this histogram. danpeng@google.com pauladedeji@google.com chrome-desktop-ntp@google.com Logs how many time a user saw the FRE when they opt out. Only logged on the 1P NTP. Note that even if the user has Google as their default search engine, Incognito and Guest mode NTPs are not considered 1P and don't log this histogram. danpeng@google.com tiborg@chromium.org chrome-desktop-ntp@google.com Logged when the user hovers on a module. Only logged once per NTP and module. Only logged on the 1P NTP. Note that even if the user has Google as their default search engine, Incognito and Guest mode NTPs are not considered 1P and don't log this histogram. danpeng@google.com tiborg@chromium.org yyushkina@chromium.org chrome-desktop-ntp@google.com Histogram of the time, in milliseconds since navigation start, it took until an NTP module header is mostly visible in the window's content area (viewport). If the module header is mostly below the page fold, the time delta will include the time it takes for the user to scroll the module into view. danpeng@google.com tiborg@chromium.org chrome-desktop-ntp@google.com Records the maximum amount that any (base histogram) or a particular (sub histograms) module was visible in the NTP content's area between load and unload of an NTP. The amount is recorded as the perdecage (x/10th) of the module's total size. Logged when the NTP unloads, such as via navigating somewhere else or closing the tab (switching tabs does not cause an unload). Logs a value into the base histogram and the corresponding sub histogram for each module that is present. Only logged on the 1P NTP. Note that even if the user has Google as their default search engine, Incognito and Guest mode NTPs are not considered 1P and don't log these histograms. It is possible for this histogram to log a value of 0 if, for instance, the module was always more than 90% below the fold. danpeng@google.com pauladedeji@google.com chrome-desktop-ntp@google.com Records the module's id when a user clicks the info button in the module's header. Only logged on the 1P NTP. Note that even if the user has Google as their default search engine, Incognito and Guest mode NTPs are not considered 1P and don't log this histogram. danpeng@google.com romanarora@chromium.org chrome-desktop-ntp@google.com The number of rendered module instances on the NTP. Only logged on the 1P NTP. Note that even if the user has Google as their default search engine, Incognito and Guest mode NTPs are not considered 1P and don't log this histogram. danpeng@google.com tiborg@chromium.org chrome-desktop-ntp@google.com Histogram of the time in milliseconds it took for an NTP module to load. danpeng@google.com tiborg@chromium.org yyushkina@chromium.org chrome-desktop-ntp@google.com Histogram of the time, in milliseconds since navigation start, it took until an NTP module loaded. danpeng@google.com tiborg@chromium.org chrome-desktop-ntp@google.com The number of rendered modules in the NTP. Only logged on the 1P NTP. Note that even if the user has Google as their default search engine, Incognito and Guest mode NTPs are not considered 1P and don't log this histogram. romanarora@chromium.org tiborg@chromium.org chrome-desktop-ntp@google.com This records the what other modules are loaded with {NtpModule} together. Logged when the module is loaded. Only logged on the 1P NTP. Note that even if the user has Google as their default search engine, Incognito and Guest mode NTPs are not considered 1P and don't log this histogram. danpeng@google.com tiborg@chromium.org chrome-desktop-ntp@google.com Records the restord modules. This is recorded when the user explicitly restores a previously dismissed module via the toast on the New Tab Page. Every restoral emits a 1 which has no inherent meaning aside from a restoral occurred. danpeng@google.com tiborg@chromium.org yyushkina@chromium.org chrome-desktop-ntp@google.com Histogram of the time, in milliseconds since navigation start, it took until the modules showed up on the NTP. danpeng@google.com tiborg@chromium.org yyushkina@chromium.org chrome-desktop-ntp@google.com Emitted each time a user action within an NTP module launches a module's feature. Every usage emits a 1 which has no inherent meaning aside from a usage occurred. Note for the Journeys module: Pre-M115, we only considered visit and suggestion clicks as usage. Since M115, we consider visit, suggestion, "Show all" and "Open all in tab group" as usage. danpeng@google.com tiborg@chromium.org yyushkina@chromium.org chrome-desktop-ntp@google.com Logs whether the NTP modules are visible at NTP load. justincohen@chromium.org mastiz@chromium.org tiborg@chromium.org yyushkina@chromium.org chrome-analysis-team@google.com chrome-desktop-ntp@google.com Histogram for user clicks of the most visited tile. The value is equal to the index of the tile. For special types of results: * Clicks on the "Add Shortcut" tile are not counted. * Clicks on the Explore Sites tile on Android are counted. The user action NewTabPage.MostVisited.Clicked is also logged at the same time as this histogram. This histogram is of special interest to the chrome-analysis-team@. Do not change its semantics or retire it without talking to them first. dibyapal@chromium.org desktop-pwas-team@google.com This records the type of most visited app on the ntp-tile, whether it is from a default app or a custom link. Triggered as soon as a migrated default app or custom link is deleted. tiborg@chromium.org romanarora@chromium.org chrome-desktop-ntp@google.com The number of tiles that are on the NTP, no matter if they are thumbnails, gray tiles, or external tiles. Recorded before reloading the suggestions, navigating to a URL, switching tabs, changing the active window or closing the tab/shutting down Chrome. The sum of this histogram does not have to equal to the total count of tile impressions (such as the total count in NewTabPage.TileType). The reason is that not all tiles have to be impressed initially (e.g., the second row of tiles may be initially out of sight on iOS). tiborg@chromium.org romanarora@chromium.org chrome-desktop-ntp@google.com The time it took until a request from the New Tab page for the OneGoogleBar script was served. Recorded only on the local NTP. tiborg@chromium.org romanarora@chromium.org chrome-desktop-ntp@google.com Histogram of the time, in milliseconds since navigation start, it took until the OneGoogleBar showed up on the NTP. Recorded only on the local NTP. jerem@google.com tiborg@chromium.org chrome-desktop-ntp@google.com Logs the state of Photos module API requests. Only logged on the 1P NTP. Note that even if the user has Google as their default search engine, Incognito and Guest mode NTPs are not considered 1P and don't log this histogram. jerem@google.com tiborg@chromium.org chrome-desktop-ntp@google.com Logs the number of memories in the photos module response. Only logged on the 1P NTP. Note that even if the user has Google as their default search engine, Incognito and Guest mode NTPs are not considered 1P and don't log this histogram. tiborg@chromium.org jerem@google.com chrome-desktop-ntp@google.com Logged every time we try to load an image in the photos module. This histogram logs 'Success' when loading was successful and 'Failure' when there was an error. Only logged on the 1P NTP. Note that even if the user has Google as their default search engine, Incognito and Guest mode NTPs are not considered 1P and don't log this histogram. tiborg@chromium.org jerem@google.com chrome-desktop-ntp@google.com Logged every time the photos module is shown to the user. This histogram logs 'Not opted-in' when the opt-in screen was shown and 'Opted-in' when memories were shown. Only logged on the 1P NTP. Note that even if the user has Google as their default search engine, Incognito and Guest mode NTPs are not considered 1P and don't log this histogram. tiborg@chromium.org jerem@google.com mplg@google.com chrome-desktop-ntp@google.com Logged every time the user changes the opt-in status of the photos module (OptIn/SoftOptOut/HardOptOut). Only logged on the 1P NTP. Note that even if the user has Google as their default search engine, Incognito and Guest mode NTPs are not considered 1P and don't log this histogram. danpeng@google.com pauladedeji@google.com chrome-desktop-ntp@google.com Logs when action is taken on promo e.g. dismissal or restoration. Only logged on the 1P NTP. Note that even if the user has Google as their default search engine, Incognito and Guest mode NTPs are not considered 1P and don't log this histogram. dbeam@chromium.org yyushkina@chromium.org chrome-analysis-team@google.com Emitted each time a promo linked is clicked on the local NTP. This histogram is of special interest to the chrome-analysis-team@. Do not change its semantics or retire it without talking to them first. mahmadi@chromium.org tiborg@chromium.org chrome-desktop-ntp@google.com Logs how many times various promo browser commands are executed. Triggered when a supported and enabled promo browser command is sent via the New Tab Page promos and is executed by the PromoBrowserCommandHandler. danpeng@google.com tiborg@chromium.org yyushkina@chromium.org chrome-desktop-ntp@google.com The time it took until a request from the New Tab page for the middle slot promo script was served. Recorded on the local and WebUI NTP. danpeng@google.com tiborg@chromium.org yyushkina@chromium.org chrome-desktop-ntp@google.com Histogram of the time, in milliseconds since navigation start, it took until a middle slot promo showed up on the NTP. Recorded on the local and WebUI NTP. Deprecated in M114 in favor of Realbox.CharTypedToRepaintLatency.ToPaint. mahmadi@chromium.org tommycli@chromium.org chrome-desktop-ntp@google.com Records the time taken between a keystroke being typed in the NTP realbox and the time when we're ready to render the results in the DOM. If there are multiple keystrokes before the results are rendered, logs the time since the earliest one. This is most comparable to Omnibox's Omnibox.CharTypedToRepaintLatency.ToPaint as it does not take into account the time the DOM change task spends in the message loop nor its duration. danpeng@google.com tiborg@chromium.org chrome-desktop-ntp@google.com Logged when a user clicked on a recipe in the recipe tasks module. The value is equal to the index of the recipe. romanarora@chromium.org tiborg@chromium.org chrome-desktop-ntp@google.com The number of recipe search links in the primary shopping task (top-ranked, recipe, search journey). The recipe search links are rendered with a name, image and URL. This metric is logged after the recipe tasks are successfuly retrieved. romanarora@chromium.org tiborg@chromium.org chrome-desktop-ntp@google.com Logged when a user clicked on a related search pill in the recipe tasks module. The value is equal to the index of the pill. romanarora@chromium.org tiborg@chromium.org chrome-desktop-ntp@google.com The number of related search links in the primary recipe task (top-ranked, recipe, search journey). The related search links are rendered with a name and URL. This metric is logged after the recipe tasks are successfuly retrieved. Removed in April 2023. fgorski@chromium.org ender@google.com yyushkina@chromium.org The time until the search box became available on the NTP in a cold start. It's a cold start if the native library is not already loaded and initialized at the time the activity is created. Only measured on Android. Removed in April 2023. fgorski@chromium.org ender@google.com yyushkina@chromium.org The time until the search box became available on the NTP in a warm start. It's a warm start if the native library is already loaded and initialized at the time the activity is created. This might happen if for example a service was already running. Only measured on Android. hanxi@chromium.org xinyiji@chromium.org Logs the reason why the search resumption module is enabled but not shown on the NTP. Recorded when NewTabPage is created and the search resumption module fails to show. hanxi@chromium.org xinyiji@chromium.org Logs whether the search resumption module is expanded or collapsed when the module is shown on the NTP. Recorded when the NewTabPage is created and the search resumption module is shown. hanxi@chromium.org xinyiji@chromium.org Logs whether the search resumption module is expanded or collapsed when the module is shown on the NTP using cached results. Recorded when the NewTabPage is created and the search resumption module is shown. maybelle@chromium.org Whether we discarded any of the snippets after fetching them due to having incomplete metadata. tiborg@chromium.org yyushkina@chromium.org chrome-desktop-ntp@google.com Histogram for impressions on the various most visited tiles. The value is equal to the index of the thumbnail. ender@google.com mahmadi@chromium.org chrome-omnibox-team@google.com Records the type of the SuggestTile that the user deleted. Most Visited URLs record a URL, and Organic Repeatable Queries record a Search type. Recorded every time the user initiates deletion of a suggest tile, that results with tile removal. Not recorded if the user chooses to cancel the action. ender@google.com mahmadi@chromium.org chrome-omnibox-team@google.com Records the type of the SuggestTile that the user interacted with. Most Visited URLs record a URL, and Organic Repeatable Queries record a Search type. Recorded every time the user selects the tile to initiate navigation, even if the navigation could not be completed (eg. target site did not load). yusuyoutube@google.com benwgold@google.com fgorski@chromium.org wylieb@chromium.org lens-chrome@google.com Logs the elapsed time between the time when user enters the Google Lens and the time when user dismisses Lens and returns to Chrome. Only logged on Android. tiborg@chromium.org yyushkina@chromium.org chrome-desktop-ntp@google.com Records the source of the title for each most visited tiled displayed when an NTP is opened, e.g. a short_name from a manifest, or the page title. danielms@google.com tiborg@chromium.org chrome-desktop-ntp@google.com Records the source for the name a most visited tile showed when the user clicked it, e.g. a URL, or the page title. danpeng@google.com tiborg@chromium.org yyushkina@chromium.org chrome-desktop-ntp@google.com The visual type of each most visited tile displayed on the new tab page, e.g. actual thumbnail or placeholder thumbnail. This is recorded for each most visited item when the NTP is opened. danpeng@google.com tiborg@chromium.org yyushkina@chromium.org chrome-desktop-ntp@google.com The visual type of the most visited item that the user clicked on, e.g. actual thumbnail or placeholder thumbnail. tiborg@chromium.org yyushkina@chromium.org chrome-desktop-ntp@google.com Logged when a 1P NTP starts loading. Logs the time since the last time a 1P NTP in the same profile started loading. Note the following: (a) The first NTP load ever is not counted. (b) This value is computed using a client-side clock and stored in prefs. As such, (i) it works across sessions and (ii) it can show strange values if a user changes their clock. (c) Even if the user has Google as their default search engine, Incognito and Guest mode NTPs are not considered 1P and don't log this histogram. freedjm@chromium.org feed@chromium.org olivierrobin@chromium.org The time spent on the new tab page as measured from when it was loaded or last brought to the foreground until it was navigated away from or hidden. Only measured on Android and iOS. yusuyoutube@google.com benwgold@google.com fgorski@chromium.org wylieb@chromium.org lens-chrome@google.com Logs the elapsed time between the time when user enters the Google Lens and the time when user dismisses Lens and returns to Chrome. Only logged on Android. Removed in April 2023. freedjm@chromium.org feed@chromium.org The time from when a new tab page is created until the first pre-draw call on the root view containing the search provider logo (if available), fake search box, most visited tiles, articles etc. More specifically, this is the time between NewTabPage's constructor and the first pre-draw pass on this root view. This typically means that the fixed UI elements are shown to the user, but the articles below are not filled in yet. tiborg@chromium.org romanarora@chromium.org chrome-desktop-ntp@google.com Records the status of the New Tab page URL when an NTP is opened. freedjm@chromium.org feed@chromium.org Android: The estimated average number of hours between two successive times when the user opens a content suggestion or clicks on the "More" button. Recorded after each time a suggestion or a More button is clicked (and after updating the model used for the estimate). tiborg@chromium.org yyushkina@chromium.org chrome-desktop-ntp@google.com Actions taken by users of Voice Search on the local New Tab Page on Desktop. These actions may navigate away from the NTP (e.g. submitting a speech query), but can also happen without navigating away from the NTP (e.g. initiating or retrying Voice Search). tiborg@chromium.org romanarora@chromium.org chrome-desktop-ntp@google.com Errors that occur during Voice Search use on the local New Tab Page on Desktop. These may be user-induced (e.g. the user's utterance could not be recognized - no match), or resulting from external circumstances (e.g. offline, lack of microphone permission). danpeng@google.com tiborg@chromium.org chrome-desktop-ntp@google.com Width of the NTP viewport in CSS pixels. Logged when the NTP loads. Only logged on the 1P NTP. Note that even if the user has Google as their default search engine, Incognito and Guest mode NTPs are not considered 1P and don't log this histogram.