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+# Metrics we collect
+
+By default, the about:newtab, about:welcome and about:home pages in Firefox (the pages you see when you open a new tab and when you start the browser), will send data back to Mozilla servers about usage of these pages. The intent is to collect data in order to improve the user's experience while using Activity Stream. Data about your specific browsing behaior or the sites you visit is **never transmitted to any Mozilla server**. At any time, it is easy to **turn off** this data collection by [opting out of Firefox telemetry](https://support.mozilla.org/kb/share-telemetry-data-mozilla-help-improve-firefox).
+
+Data is sent to our servers in the form of discrete HTTPS 'pings' or messages whenever you do some action on the Activity Stream about:home, about:newtab or about:welcome pages. We try to minimize the amount and frequency of pings by batching them together. Pings are sent in [JSON serialized format](http://www.js.org/).
+
+At Mozilla, [we take your privacy very seriously](https://www.mozilla.org/privacy/). The Activity Stream page will never send any data that could personally identify you. We do not transmit what you are browsing, searches you perform or any private settings. Activity Stream does not set or send cookies, and uses [Transport Layer Security](https://en.wikipedia.org/wiki/Transport_Layer_Security) to securely transmit data to Mozilla servers.
+
+Data collected from Activity Stream is retained on Mozilla secured servers for a period of 30 days before being rolled up into an anonymous aggregated format. After this period the raw data is deleted permanently. Mozilla **never shares data with any third party**.
+
+The following is a detailed overview of the different kinds of data we collect in the Activity Stream. See [data_dictionary.md](data_dictionary.md) for more details for each field.
+
+## Page takeover ping
+
+This ping is submitted once upon Activity Stream initialization if either about:home or about:newtab are set to a custom URL. It sends the category of the custom URL. It also includes the web extension id of the extension controlling the home and/or newtab page.
+
+```js
+{
+ "event": "PAGE_TAKEOVER_DATA",
+ "value": {
+ "home_url_category": [
+ "search-engine" |
+ "search-engine-mozilla-tag" |
+ "search-engine-other-tag" |
+ "news-portal" |
+ "ecommerce" |
+ "social-media" |
+ "known-hijacker" |
+ "other"
+ ],
+ "home_extension_id": "26288a14-5cc4-d14f-ae0a-bb01ef45be9c",
+ "newtab_url_category": [
+ "search-engine" |
+ "search-engine-mozilla-tag" |
+ "search-engine-other-tag" |
+ "news-portal" |
+ "ecommerce" |
+ "social-media" |
+ "known-hijacker" |
+ "other"
+ ],
+ "newtab_extension_id": "26288a14-5cc4-d14f-ae0a-bb01ef45be9c"
+ },
+
+ // Basic metadata
+ "action": "activity_stream_event",
+ "client_id": "26288a14-5cc4-d14f-ae0a-bb01ef45be9c",
+ "session_id": "005deed0-e3e4-4c02-a041-17405fd703f6",
+ "browser_session_id": "e7e52665-7db3-f348-9918-e93160eb2ef3",
+ "addon_version": "20180710100040",
+ "locale": "en-US",
+ "experiments": {
+ "experiment_1": { "branch": "control" },
+ "experiment_2": { "branch": "treatment" }
+ },
+ "user_prefs": 7
+}
+```
+
+## User event pings
+
+These pings are captured when a user **performs some kind of interaction** in the add-on.
+
+### Basic shape
+
+A user event ping includes some basic metadata (tab id, addon version, etc.) as well as variable fields which indicate the location and action of the event.
+
+```js
+{
+ // This indicates the type of interaction
+ "event": [
+ "CLICK",
+ "SEARCH",
+ "BLOCK",
+ "DELETE",
+ "IMPRESSION",
+ "OPEN_NEW_WINDOW",
+ "OPEN_PRIVATE_WINDOW",
+ "BOOKMARK_DELETE",
+ "BOOKMARK_ADD",
+ "OPEN_NEWTAB_PREFS",
+ "CLOSE_NEWTAB_PREFS",
+ "SEARCH_HANDOFF",
+ "SHOW_PERSONALIZE",
+ "HIDE_PERSONALIZE"
+ ],
+
+ // Optional field indicating the UI component type
+ "source": "TOP_SITES",
+
+ // Optional field if there is more than one of a component type on a page.
+ // It is zero-indexed.
+ // For example, clicking the second Highlight would result in an action_position of 1
+ "action_position": 1,
+
+ // Basic metadata
+ "page": ["about:newtab" | "about:home" | "about:welcome" | "unknown"],
+ "client_id": "26288a14-5cc4-d14f-ae0a-bb01ef45be9c",
+ "session_id": "005deed0-e3e4-4c02-a041-17405fd703f6",
+ "browser_session_id": "e7e52665-7db3-f348-9918-e93160eb2ef3",
+ "addon_version": "20180710100040",
+ "locale": "en-US",
+ "action": "activity_stream_event",
+ "experiments": {
+ "experiment_1": { "branch": "control" },
+ "experiment_2": { "branch": "treatment" }
+ },
+ "user_prefs": 7
+}
+```
+
+### Types of user interactions
+
+#### Show/hide Personalization Panel
+
+```js
+{
+ "event": ["SHOW_PERSONALIZE" | "HIDE_PERSONALIZE"], // Basic metadata
+ "action": "activity_stream_event",
+ "page": ["about:newtab" | "about:home" | "about:welcome" | "unknown"],
+ "client_id": "26288a14-5cc4-d14f-ae0a-bb01ef45be9c",
+ "session_id": "005deed0-e3e4-4c02-a041-17405fd703f6",
+ "browser_session_id": "e7e52665-7db3-f348-9918-e93160eb2ef3",
+ "addon_version": "20180710100040",
+ "locale": "en-US",
+ "user_prefs": 7
+}
+```
+
+#### Performing a search
+
+```js
+{
+ "event": "SEARCH",
+
+ // Basic metadata
+ "action": "activity_stream_event",
+ "page": ["about:newtab" | "about:home" | "about:welcome" | "unknown"],
+ "client_id": "26288a14-5cc4-d14f-ae0a-bb01ef45be9c",
+ "session_id": "005deed0-e3e4-4c02-a041-17405fd703f6",
+ "browser_session_id": "e7e52665-7db3-f348-9918-e93160eb2ef3",
+ "addon_version": "20180710100040",
+ "locale": "en-US",
+ "user_prefs": 7
+}
+```
+
+#### Performing a search handoff
+
+```js
+{
+ "event": "SEARCH_HANDOFF",
+
+ // Basic metadata
+ "action": "activity_stream_event",
+ "page": ["about:newtab" | "about:home" | "about:welcome" | "unknown"],
+ "client_id": "26288a14-5cc4-d14f-ae0a-bb01ef45be9c",
+ "session_id": "005deed0-e3e4-4c02-a041-17405fd703f6",
+ "browser_session_id": "e7e52665-7db3-f348-9918-e93160eb2ef3",
+ "addon_version": "20180710100040",
+ "locale": "en-US",
+ "user_prefs": 7
+}
+```
+
+#### Clicking a top site item
+
+```js
+{
+ "event": "CLICK",
+ "source": "TOP_SITES",
+ "action_position": 2,
+ "value": {
+ "card_type": ["pinned" | "search" | "spoc"],
+ "icon_type": ["screenshot_with_icon" | "screenshot" | "tippytop" | "rich_icon" | "no_image" | "custom_screenshot"],
+ // only exists if its card_type = "search"
+ "search_vendor": "google"
+ }
+
+ // Basic metadata
+ "action": "activity_stream_event",
+ "page": ["about:newtab" | "about:home" | "about:welcome" | "unknown"],
+ "client_id": "26288a14-5cc4-d14f-ae0a-bb01ef45be9c",
+ "session_id": "005deed0-e3e4-4c02-a041-17405fd703f6",
+ "browser_session_id": "e7e52665-7db3-f348-9918-e93160eb2ef3",
+ "addon_version": "20180710100040",
+ "locale": "en-US",
+ "user_prefs": 7
+}
+```
+
+#### Clicking a top story item
+
+```js
+{
+ "event": "CLICK",
+ "source": ["CARDGRID" | "CARDGRID_WIDGET"],
+ "action_position": 2,
+ "value": {
+ // "spoc" for sponsored stories, "organic" for regular stories.
+ "card_type": ["organic" | "spoc" | "topics_widget"],
+ // topic and position only exists if its card_type = "topics_widget"
+ "topic": "entertainment"
+ // The index position of the topic link within the card
+ "position_in_card": 0
+ }
+
+ // Basic metadata
+ "action": "activity_stream_event",
+ "page": ["about:newtab" | "about:home" | "about:welcome" | "unknown"],
+ "client_id": "26288a14-5cc4-d14f-ae0a-bb01ef45be9c",
+ "session_id": "005deed0-e3e4-4c02-a041-17405fd703f6",
+ "browser_session_id": "e7e52665-7db3-f348-9918-e93160eb2ef3",
+ "addon_version": "20180710100040",
+ "locale": "en-US",
+ "user_prefs": 7
+}
+```
+
+#### Clicking a popular topic link
+
+```js
+{
+ "event": "CLICK",
+ "source": "POPULAR_TOPICS",
+ "value": {
+ "topic": ["must-reads" | "productivity" | "health" | "finance" | "technology" | "more-recommendations"]
+ }
+ // Basic metadata
+ "action": "activity_stream_event",
+ "page": ["about:newtab" | "about:home" | "about:welcome" | "unknown"],
+ "client_id": "26288a14-5cc4-d14f-ae0a-bb01ef45be9c",
+ "session_id": "005deed0-e3e4-4c02-a041-17405fd703f6",
+ "browser_session_id": "e7e52665-7db3-f348-9918-e93160eb2ef3",
+ "addon_version": "20180710100040",
+ "locale": "en-US",
+ "user_prefs": 7
+}
+```
+
+#### Adding a search shortcut
+
+```js
+{
+ "event": "SEARCH_EDIT_ADD",
+ "source": "TOP_SITES",
+ "action_position": 2,
+ "value": {
+ "search_vendor": "google"
+ }
+
+ // Basic metadata
+ "action": "activity_stream_event",
+ "page": ["about:newtab" | "about:home" | "about:welcome" | "unknown"],
+ "client_id": "26288a14-5cc4-d14f-ae0a-bb01ef45be9c",
+ "session_id": "005deed0-e3e4-4c02-a041-17405fd703f6",
+ "browser_session_id": "e7e52665-7db3-f348-9918-e93160eb2ef3",
+ "addon_version": "20180710100040",
+ "locale": "en-US",
+ "user_prefs": 7
+}
+```
+
+#### Showing privacy information
+
+```js
+{
+ "event": "SHOW_PRIVACY_INFO",
+ "source": "TOP_SITES",
+ "action_position": 2,
+
+ // Basic metadata
+ "action": "activity_stream_event",
+ "page": ["about:newtab" | "about:home" | "about:welcome" | "unknown"],
+ "client_id": "26288a14-5cc4-d14f-ae0a-bb01ef45be9c",
+ "session_id": "005deed0-e3e4-4c02-a041-17405fd703f6",
+ "browser_session_id": "e7e52665-7db3-f348-9918-e93160eb2ef3",
+ "addon_version": "20180710100040",
+ "locale": "en-US",
+ "user_prefs": 7
+}
+```
+
+#### Clicking on privacy information link
+
+```js
+{
+ "event": "CLICK_PRIVACY_INFO",
+ "source": "DS_PRIVACY_MODAL",
+
+ // Basic metadata
+ "action": "activity_stream_event",
+ "page": ["about:newtab" | "about:home" | "about:welcome" | "unknown"],
+ "client_id": "26288a14-5cc4-d14f-ae0a-bb01ef45be9c",
+ "session_id": "005deed0-e3e4-4c02-a041-17405fd703f6",
+ "browser_session_id": "e7e52665-7db3-f348-9918-e93160eb2ef3",
+ "addon_version": "20180710100040",
+ "locale": "en-US",
+ "user_prefs": 7
+}
+```
+
+#### Deleting a search shortcut
+
+```js
+{
+ "event": "SEARCH_EDIT_DELETE",
+ "source": "TOP_SITES",
+ "action_position": 2,
+ "value": {
+ "search_vendor": "google"
+ }
+
+ // Basic metadata
+ "action": "activity_stream_event",
+ "page": ["about:newtab" | "about:home" | "about:welcome" | "unknown"],
+ "client_id": "26288a14-5cc4-d14f-ae0a-bb01ef45be9c",
+ "session_id": "005deed0-e3e4-4c02-a041-17405fd703f6",
+ "browser_session_id": "e7e52665-7db3-f348-9918-e93160eb2ef3",
+ "addon_version": "20180710100040",
+ "locale": "en-US",
+ "user_prefs": 7
+}
+```
+
+#### Deleting an item from history
+
+```js
+{
+ "event": "DELETE",
+ "source": "TOP_SITES",
+ "action_position": 2,
+ "value": {
+ "card_type": "pinned",
+ "icon_type": ["screenshot_with_icon" | "screenshot" | "tippytop" | "rich_icon" | "no_image" | "custom_screenshot"]
+ }
+
+ // Basic metadata
+ "action": "activity_stream_event",
+ "page": ["about:newtab" | "about:home" | "about:welcome" | "unknown"],
+ "client_id": "26288a14-5cc4-d14f-ae0a-bb01ef45be9c",
+ "session_id": "005deed0-e3e4-4c02-a041-17405fd703f6",
+ "browser_session_id": "e7e52665-7db3-f348-9918-e93160eb2ef3",
+ "addon_version": "20180710100040",
+ "locale": "en-US",
+ "user_prefs": 7
+}
+```
+
+#### Blocking a site
+
+```js
+{
+ "event": "BLOCK",
+ "source": "TOP_SITES",
+ "action_position": 2,
+ "value": {
+ "card_type": ["pinned" | "search" | "spoc"],
+ "icon_type": ["screenshot_with_icon" | "screenshot" | "tippytop" | "rich_icon" | "no_image" | "custom_screenshot"],
+ // only exists if its card_type = "search"
+ "search_vendor": "google"
+ }
+
+ // Basic metadata
+ "action": "activity_stream_event",
+ "page": ["about:newtab" | "about:home" | "about:welcome" | "unknown"],
+ "client_id": "26288a14-5cc4-d14f-ae0a-bb01ef45be9c",
+ "session_id": "005deed0-e3e4-4c02-a041-17405fd703f6",
+ "browser_session_id": "e7e52665-7db3-f348-9918-e93160eb2ef3",
+ "addon_version": "20180710100040",
+ "locale": "en-US",
+ "user_prefs": 7
+}
+```
+
+#### Bookmarking a link
+
+```js
+{
+ "event": "BOOKMARK_ADD",
+ "source": "HIGHLIGHTS",
+ "action_position": 2,
+ "value": {
+ "card_type": "trending"
+ }
+
+ // Basic metadata
+ "action": "activity_stream_event",
+ "page": ["about:newtab" | "about:home" | "about:welcome"],
+ "client_id": "26288a14-5cc4-d14f-ae0a-bb01ef45be9c",
+ "session_id": "005deed0-e3e4-4c02-a041-17405fd703f6",
+ "browser_session_id": "e7e52665-7db3-f348-9918-e93160eb2ef3",
+ "addon_version": "20180710100040",
+ "locale": "en-US",
+ "user_prefs": 7
+}
+```
+
+#### Removing a bookmark from a link
+
+```js
+{
+ "event": "BOOKMARK_DELETE",
+ "source": "HIGHLIGHTS",
+ "action_position": 2,
+ "value": {
+ "card_type": "bookmark"
+ }
+
+ // Basic metadata
+ "action": "activity_stream_event",
+ "page": ["about:newtab" | "about:home" | "about:welcome" | "unknown"],
+ "client_id": "26288a14-5cc4-d14f-ae0a-bb01ef45be9c",
+ "session_id": "005deed0-e3e4-4c02-a041-17405fd703f6",
+ "browser_session_id": "e7e52665-7db3-f348-9918-e93160eb2ef3",
+ "addon_version": "20180710100040",
+ "locale": "en-US",
+ "user_prefs": 7
+}
+```
+
+#### Opening a link in a new window
+
+```js
+{
+ "event": "OPEN_NEW_WINDOW",
+ "source": "TOP_SITES",
+ "action_position": 2,
+ "value": {
+ "card_type": "pinned",
+ "icon_type": ["screenshot_with_icon" | "screenshot" | "tippytop" | "rich_icon" | "no_image" | "custom_screenshot"]
+ }
+
+ // Basic metadata
+ "action": "activity_stream_event",
+ "page": ["about:newtab" | "about:home" | "about:welcome" | "unknown"],
+ "client_id": "26288a14-5cc4-d14f-ae0a-bb01ef45be9c",
+ "session_id": "005deed0-e3e4-4c02-a041-17405fd703f6",
+ "browser_session_id": "e7e52665-7db3-f348-9918-e93160eb2ef3",
+ "addon_version": "20180710100040",
+ "locale": "en-US",
+ "user_prefs": 7
+}
+```
+
+#### Opening a link in a new private window
+
+```js
+{
+ "event": "OPEN_PRIVATE_WINDOW",
+ "source": "TOP_SITES",
+ "action_position": 2,
+ "value": {
+ "card_type": "pinned",
+ "icon_type": ["screenshot_with_icon" | "screenshot" | "tippytop" | "rich_icon" | "no_image" | "custom_screenshot"]
+ }
+
+ // Basic metadata
+ "action": "activity_stream_event",
+ "page": ["about:newtab" | "about:home" | "about:welcome" | "unknown"],
+ "client_id": "26288a14-5cc4-d14f-ae0a-bb01ef45be9c",
+ "session_id": "005deed0-e3e4-4c02-a041-17405fd703f6",
+ "browser_session_id": "e7e52665-7db3-f348-9918-e93160eb2ef3",
+ "addon_version": "20180710100040",
+ "locale": "en-US",
+ "user_prefs": 7
+}
+```
+
+#### Opening the new tab preferences pane
+
+```js
+{
+ "event": "OPEN_NEWTAB_PREFS",
+
+ // Basic metadata
+ "action": "activity_stream_event",
+ "page": ["about:newtab" | "about:home" | "about:welcome" | "unknown"],
+ "client_id": "26288a14-5cc4-d14f-ae0a-bb01ef45be9c",
+ "session_id": "005deed0-e3e4-4c02-a041-17405fd703f6",
+ "browser_session_id": "e7e52665-7db3-f348-9918-e93160eb2ef3",
+ "addon_version": "20180710100040",
+ "locale": "en-US",
+ "user_prefs": 7
+}
+```
+
+#### Closing the new tab preferences pane
+
+```js
+{
+ "event": "CLOSE_NEWTAB_PREFS",
+
+ // Basic metadata
+ "action": "activity_stream_event",
+ "page": ["about:newtab" | "about:home" | "about:welcome" | "unknown"],
+ "client_id": "26288a14-5cc4-d14f-ae0a-bb01ef45be9c",
+ "session_id": "005deed0-e3e4-4c02-a041-17405fd703f6",
+ "browser_session_id": "e7e52665-7db3-f348-9918-e93160eb2ef3",
+ "addon_version": "20180710100040",
+ "locale": "en-US",
+ "user_prefs": 7
+}
+```
+
+#### Changing preferences from about:preferences#home or on the customize menu on the newtab page.
+
+```js
+{
+ "event": "PREF_CHANGED",
+ "source": ["TOP_STORIES" | "POCKET_SPOCS" | "HIGHLIGHTS" | "SNIPPETS" | "TOP_SITES" | "SPONSORED_TOP_SITES"],
+ "value": "{\"status\":true|false,\"menu_source\":\"ABOUT_PREFERENCES|CUSTOMIZE_MENU\"}"
+ "release_channel": "default",
+ "experiments": {},
+ "client_id": "26288a14-5cc4-d14f-ae0a-bb01ef45be9c",
+ "browser_session_id": "e7e52665-7db3-f348-9918-e93160eb2ef3",
+ "addon_version": "20180710100040",
+ "locale": "en-US",
+ "user_prefs": 7
+}
+```
+
+#### Pinning a tab
+
+```js
+{
+ "event": "TABPINNED",
+ "source": "TAB_CONTEXT_MENU",
+ "value": "{\"total_pinned_tabs\":2}",
+
+ // Basic metadata
+ "action": "activity_stream_user_event",
+ "client_id": "aabaace5-35f4-7345-a28e-5502147dc93c",
+ "version": "67.0a1",
+ "addon_version": "20190218094427",
+ "locale": "en-US",
+ "user_prefs": 59,
+ "page": "n/a",
+ "session_id": "n/a",
+ "browser_session_id": "e7e52665-7db3-f348-9918-e93160eb2ef3"
+}
+```
+
+#### Adding or editing a new TopSite
+
+```js
+{
+ "event": "TOP_SITES_EDIT",
+ "source": "TOP_SITES_SOURCE",
+ "browser_session_id": "e7e52665-7db3-f348-9918-e93160eb2ef3",
+ // "-1" Is used for prepending a new TopSite at the front of the list, while
+ // any other possible value is used for editing an existing TopSite slot.
+ "action_position": [-1 | "0..TOP_SITES_LENGTH"]
+}
+```
+
+#### Requesting a custom screenshot preview
+
+```js
+{
+ "event": "PREVIEW_REQUEST",
+ "browser_session_id": "e7e52665-7db3-f348-9918-e93160eb2ef3",
+ "source": "TOP_SITES"
+}
+```
+
+## Session end pings
+
+When a session ends, the browser will send a `"activity_stream_session"` ping to our metrics servers. This ping contains the length of the session, a unique reason for why the session ended, and some additional metadata.
+
+### Basic event
+
+All `"activity_stream_session"` pings have the following basic shape. Some fields are variable.
+
+```js
+{
+ "action": "activity_stream_session",
+ "client_id": "26288a14-5cc4-d14f-ae0a-bb01ef45be9c",
+ "session_id": "005deed0-e3e4-4c02-a041-17405fd703f6",
+ "addon_version": "20180710100040",
+ "locale": "en-US",
+ "page": ["about:newtab" | "about:home" | "about:welcome" | "unknown"],
+ "session_duration": 4199,
+ "profile_creation_date": 14786,
+ "experiments": {
+ "experiment_1": { "branch": "control" },
+ "experiment_2": { "branch": "treatment" }
+ },
+ "user_prefs": 7
+}
+```
+
+### What causes a session end?
+
+Here are different scenarios that cause a session end event to be sent:
+
+1. After a search
+2. Clicking on something that causes navigation (top site, highlight, etc.)
+3. Closing the browser
+4. Refreshing
+5. Navigating to a new URL via the url bar or file menu
+
+### Session performance data
+
+This data is held in a child object of the `activity_stream_session` event called `perf`. All fields suffixed by `_ts` are type `DOMHighResTimeStamp` (aka a double of milliseconds, with a 5 microsecond precision) with 0 being the [timeOrigin](https://developer.mozilla.org/en-US/docs/Web/API/DOMHighResTimeStamp#The_time_origin) of the browser's hidden chrome window.
+
+An example might look like this:
+
+```js
+perf: {
+ // Timestamp of the action perceived by the user to trigger the load
+ // of this page.
+ //
+ // Not required at least for error cases where the
+ // observer event doesn't fire
+ "load_trigger_ts": 1,
+
+ // What was the perceived trigger of the load action:
+ "load_trigger_type": [
+ "first_window_opened" | // home only
+ "menu_plus_or_keyboard" | // newtab only
+ "unexpected" // sessions lacking actual start times
+ ],
+
+ // when the page itself receives an event that document.visibilityStat=visible
+ "visibility_event_rcvd_ts": 2,
+
+ // When did the topsites element finish painting? Note that, at least for
+ // the first tab to be loaded, and maybe some others, this will be before
+ // topsites has yet to receive screenshots updates from the add-on code,
+ // and is therefore just showing placeholder screenshots.
+ "topsites_first_painted_ts": 5,
+
+ // The 6 different types of TopSites icons and how many of each kind did the
+ // user see.
+ "topsites_icon_stats": {
+ "custom_screenshot": 0,
+ "screenshot_with_icon": 2,
+ "screenshot": 1,
+ "tippytop": 2,
+ "rich_icon": 1,
+ "no_image": 0
+ },
+
+ // The number of Top Sites that are pinned.
+ "topsites_pinned": 3,
+
+ // The number of search shortcut Top Sites.
+ "topsites_search_shortcuts": 2,
+
+ // How much longer the data took, in milliseconds, to be ready for display
+ // than it would have been in the ideal case. The user currently sees placeholder
+ // cards instead of real cards for approximately this length of time. This is
+ // sent when the first call of the component's `render()` method happens with
+ // `this.props.initialized` set to `false`, and the value is the amount of
+ // time in ms until `render()` is called with `this.props.initialized` set to `true`.
+ "highlights_data_late_by_ms": 67,
+ "topsites_data_late_by_ms": 35,
+
+ // Whether the page is preloaded or not.
+ "is_preloaded": [true|false],
+}
+```
+
+## Top Story pings
+
+When Top Story (currently powered by Pocket) is enabled in Activity Stream, the browser will send following `activity_stream_impression_stats` to our metrics servers.
+
+### Impression stats
+
+This reports all the Pocket recommended articles (a list of `id`s) when the user opens a newtab.
+
+```js
+{
+ "impression_id": "{005deed0-e3e4-4c02-a041-17405fd703f6}",
+ "addon_version": "20180710100040",
+ "locale": "en-US",
+ "source": "pocket",
+ "page": ["about:newtab" | "about:home" | "about:welcome" | "unknown"],
+ "user_prefs": 7,
+ "window_inner_width": 1000,
+ "window_inner_height" 900,
+ "experiments": {
+ "experiment_1": {"branch": "control"},
+ "experiment_2": {"branch": "treatment"}
+ },
+ "tiles": [{"id": 10000}, {"id": 10001}, {"id": 10002}]
+}
+```
+
+### Click/block/save_to_pocket ping
+
+This reports the user's interaction with those Pocket tiles.
+
+```js
+{
+ "impression_id": "{005deed0-e3e4-4c02-a041-17405fd703f6}",
+ "addon_version": "20180710100040",
+ "locale": "en-US",
+ "source": "pocket",
+ "page": ["about:newtab" | "about:home" | "about:welcome" | "unknown"],
+ "experiments": {
+ "experiment_1": {"branch": "control"},
+ "experiment_2": {"branch": "treatment"}
+ },
+ "user_prefs": 7,
+ "window_inner_width": 1000,
+ "window_inner_height" 900,
+
+ // "pos" is the 0-based index to record the tile's position in the Pocket section.
+ // "shim" is a base64 encoded shim attached to spocs, unique to the impression from the Ad server.
+ "tiles": [{"id": 10000, "pos": 0, "shim": "enuYa1j73z3RzxgTexHNxYPC/b,9JT6w5KB0CRKYEU+"}],
+
+ // A 0-based index to record which tile in the "tiles" list that the user just interacted with.
+ "click|block|pocket": 0
+}
+```
+
+## Save to Pocket button pings
+
+Right now the save to Pocket button, while technically outside of newtab, has some similarities with the newtab telemetry.
+
+These pings record user interaction with the save to Pocket button.
+
+### Click/impression ping
+
+```js
+{
+ "locale": "en-US",
+ "version": "83.0a1",
+ "release_channel": "default",
+ "model": "",
+ "events": [
+ {
+ "action": "click|impression|unpin",
+ "position": 0,
+ "source": ["recs_learn_more" | "view_list" | "home_view_list" | "home_topic" | "home_discover" | "save_button" | "home_button" | "on_save_recs" | "learn_more" | "sign_up_1" | "sign_up_2" | "log_in"]
+ }
+ ],
+ "pocket_logged_in_state": true | false,
+ "impression_id": "{005deed0-e3e4-4c02-a041-17405fd703f6}",
+ "profile_creation_date": 18550
+}
+```
+
+## Activity Stream Router pings
+
+These pings record the impression and user interactions within Activity Stream Router.
+
+### Impression ping
+
+This reports the impression of Activity Stream Router.
+
+#### Snippets impression
+
+```js
+{
+ "client_id": "26288a14-5cc4-d14f-ae0a-bb01ef45be9c",
+ "action": "snippets_user_event",
+ "impression_id": "n/a",
+ "source": "SNIPPETS",
+ "addon_version": "20180710100040",
+ "locale": "en-US",
+ "experiments": {
+ "experiment_1": { "branch": "control" },
+ "experiment_2": { "branch": "treatment" }
+ },
+ "source": "NEWTAB_FOOTER_BAR",
+ "message_id": "some_snippet_id",
+ "event": "IMPRESSION"
+}
+```
+
+CFR impression ping has two forms, in which the message_id could be of different meanings.
+
+#### CFR impression for all the prerelease channels and shield experiment
+
+```js
+{
+ "client_id": "26288a14-5cc4-d14f-ae0a-bb01ef45be9c",
+ "action": "cfr_user_event",
+ "impression_id": "n/a",
+ "addon_version": "20180710100040",
+ "locale": "en-US",
+ "experiments": {
+ "experiment_1": { "branch": "control" },
+ "experiment_2": { "branch": "treatment" }
+ },
+ "source": "CFR",
+ // message_id could be the ID of the recommendation, such as "wikipedia_addon"
+ "message_id": "wikipedia_addon",
+ "event": "IMPRESSION"
+}
+```
+
+#### CFR impression for the release channel
+
+```js
+{
+ "client_id": "n/a",
+ "action": "cfr_user_event",
+ "impression_id": "{005deed0-e3e4-4c02-a041-17405fd703f6}",
+ "addon_version": "20180710100040",
+ "locale": "en-US",
+ "experiments": {
+ "experiment_1": { "branch": "control" },
+ "experiment_2": { "branch": "treatment" }
+ },
+ "source": "CFR",
+ // message_id should be a bucket ID in the release channel, we may not use the
+ // individual ID, such as addon ID, per legal's request
+ "message_id": "bucket_id",
+ "event": "IMPRESSION"
+}
+```
+
+### User interaction pings
+
+This reports the user's interaction with Activity Stream Router.
+
+#### Snippets interaction pings
+
+```js
+{
+ "client_id": "26288a14-5cc4-d14f-ae0a-bb01ef45be9c",
+ "action": "snippets_user_event",
+ "addon_version": "20180710100040",
+ "impression_id": "n/a",
+ "locale": "en-US",
+ "experiments": {
+ "experiment_1": { "branch": "control" },
+ "experiment_2": { "branch": "treatment" }
+ },
+ "source": "NEWTAB_FOOTER_BAR",
+ "message_id": "some_snippet_id",
+ "event": ["CLICK_BUTTION" | "BLOCK"]
+}
+```
+
+#### CFR interaction pings for all the prerelease channels and shield experiment
+
+```js
+{
+ "client_id": "26288a14-5cc4-d14f-ae0a-bb01ef45be9c",
+ "action": "cfr_user_event",
+ "addon_version": "20180710100040",
+ "impression_id": "n/a",
+ "locale": "en-US",
+ "experiments": {
+ "experiment_1": { "branch": "control" },
+ "experiment_2": { "branch": "treatment" }
+ },
+ "source": "CFR",
+ // message_id could be the ID of the recommendation, such as "wikipedia_addon"
+ "message_id": "wikipedia_addon",
+ "event": ["IMPRESSION" | "INSTALL" | "PIN" | "BLOCK" | "DISMISS" | "RATIONALE" | "LEARN_MORE" | "CLICK" | "CLICK_DOORHANGER" | "MANAGE"],
+ // "modelVersion" records the model identifier for the CFR machine learning experiment, see more detail in Bug 1594422.
+ // Non-experiment users will not report this field.
+ "event_context": "{ \"modelVersion\": \"some_model_version_id\" }"
+}
+```
+
+#### CFR interaction pings for release channel
+
+```js
+{
+ "client_id": "n/a",
+ "action": "cfr_user_event",
+ "addon_version": "20180710100040",
+ "impression_id": "{005deed0-e3e4-4c02-a041-17405fd703f6}",
+ "locale": "en-US",
+ "experiments": {
+ "experiment_1": { "branch": "control" },
+ "experiment_2": { "branch": "treatment" }
+ },
+ "source": "CFR",
+ // message_id should be a bucket ID in the release channel, we may not use the
+ // individual ID, such as addon ID, per legal's request
+ "message_id": "bucket_id",
+ "event": ["IMPRESSION" | "INSTALL" | "PIN" | "BLOCK" | "DISMISS" | "RATIONALE" | "LEARN_MORE" | "CLICK" | "CLICK_DOORHANGER" | "MANAGE"],
+}
+```
+
+### Targeting error pings
+
+This reports when an error has occurred when parsing/evaluating a JEXL targeting string in a message.
+
+```js
+{
+ "client_id": "n/a",
+ "action": "asrouter_undesired_event",
+ "addon_version": "20180710100040",
+ "impression_id": "{005deed0-e3e4-4c02-a041-17405fd703f6}",
+ "locale": "en-US",
+ "experiments": {
+ "experiment_1": { "branch": "control" },
+ "experiment_2": { "branch": "treatment" }
+ },
+ "message_id": "some_message_id",
+ "event": "TARGETING_EXPRESSION_ERROR",
+ "event_context": ["MALFORMED_EXPRESSION" | "OTHER_ERROR"]
+}
+```
+
+### Remote Settings error pings
+
+This reports a failure in the Remote Settings loader to load messages for Activity Stream Router.
+
+```js
+{
+ "action": "asrouter_undesired_event",
+ "client_id": "n/a",
+ "addon_version": "20180710100040",
+ "locale": "en-US",
+ "experiments": {
+ "experiment_1": { "branch": "control" },
+ "experiment_2": { "branch": "treatment" }
+ },
+ "user_prefs": 7,
+ "event": ["ASR_RS_NO_MESSAGES" | "ASR_RS_ERROR"],
+ // The value is set to the ID of the message provider. For example: remote-cfr, remote-onboarding, etc.
+ "event_context": "REMOTE_PROVIDER_ID"
+}
+```
+
+## Toolbar Badge interaction pings
+
+This reports when a user has seen or clicked a badge/notification in the browser toolbar in a non-PBM window
+
+```js
+{
+ "locale": "en-US",
+ "client_id": "9da773d8-4356-f54f-b7cf-6134726bcf3d",
+ "version": "70.0a1",
+ "release_channel": "default",
+ "addon_version": "20190712095934",
+ "action": "cfr_user_event",
+ "experiments": {
+ "experiment_1": { "branch": "control" },
+ "experiment_2": { "branch": "treatment" }
+ },
+ "source": "CFR",
+ "message_id": "FXA_ACCOUNTS_BADGE",
+ "event": ["CLICK" | "IMPRESSION"]
+}
+```
+
+## Panel interaction pings
+
+This reports when a user opens the panel, views messages and clicks on a message.
+For message impressions we concatenate the ids of all messages in the panel.
+
+```js
+{
+ "locale": "en-US",
+ "client_id": "9da773d8-4356-f54f-b7cf-6134726bcf3d",
+ "version": "70.0a1",
+ "release_channel": "default",
+ "addon_version": "20190712095934",
+ "action": "cfr_user_event",
+ "experiments": {
+ "experiment_1": { "branch": "control" },
+ "experiment_2": { "branch": "treatment" }
+ },
+ "source": "CFR",
+ "message_id": "WHATS_NEW_70",
+ "event": ["CLICK" | "IMPRESSION"],
+ "value": { "view": ["application_menu" | "toolbar_dropdown"] }
+}
+```
+
+We also report when the panel checkbox (used to allow users to opt out of
+notifications) is checked or unchecked.
+
+```js
+{
+ ...
+ "message_id": "n/a",
+ "event": "WNP_PREF_TOGGLE",
+ "value": { "prefValue": true }
+}
+```
+
+## Moments page pings
+
+This reports when a moments page message has set the user preference for
+`browser.startup.homepage_override.once`. It goes through the same policy
+as other CFR messages.
+
+```js
+// Release ping
+{
+ "action": "cfr_user_event"
+ "addon_version": "20200225022813"
+ "bucket_id": "WNP_THANK_YOU"
+ "event": "MOMENTS_PAGE_SET"
+ "impression_id": "{d85d2268-b751-9543-b6d7-aad523bf2b26}"
+ "experiments": {
+ "experiment_1": {"branch": "control"},
+ "experiment_2": {"branch": "treatment"}
+ },
+ "locale": "en-US"
+ "message_id": "n/a"
+ "source": "CFR"
+}
+
+// Beta and Nightly channels
+{
+ "source": "CFR",
+ "message_id": "WNP_THANK_YOU",
+ "bucket_id": "WNP_THANK_YOU",
+ "event": "MOMENTS_PAGE_SET",
+ "addon_version": "20200225022813",
+ "experiments": {
+ "experiment_1": {"branch": "control"},
+ "experiment_2": {"branch": "treatment"}
+ },
+ "locale": "en-US",
+ "client_id": "21dc1375-b24e-984b-83e9-c8a9660ae4ff"
+}
+```
+
+## InfoBar pings
+
+This reports when the user interacts with the browser infobar (messaging area
+located at the top of the content area). Similar policy applied as for the
+What's New panel client_id is reported in all the channels.
+
+```js
+{
+ "experiments": {
+ "exp1": {
+ "branch": "treatment-a"
+ }
+ },
+ "addon_version": "20210115035053",
+ "release_channel": "release",
+ "locale": "en-US",
+ "event": [
+ "IMPRESSION",
+ "CLICK_PRIMARY_BUTTON",
+ "CLICK_SECONDARY_BUTTON",
+ "DISMISSED"
+ ],
+ "client_id": "c4beb4bf-4feb-9c4e-9587-9323b28c2e50",
+ "version": "86",
+ "message_id": "INFOBAR_ACTION_86",
+ "browser_session_id": "93714e76-9919-ca49-b697-5e7c09a1394f"
+}
+```
+
+## Spotlight pings
+
+This reports when the user interacts with the Messaging System Spotlight component
+Similar policy applied as for the Infobar messages: client_id is reported in all
+the channels. Currently this is only used in experiments.
+
+```js
+{
+ "experiments": {
+ "exp1": {
+ "branch": "treatment-a"
+ }
+ },
+ "addon_version": "20210115035053",
+ "release_channel": "release",
+ "locale": "en-US",
+ "event": ["IMPRESSION" | "CLICK" | "DISMISS"],
+ "client_id": "c4beb4bf-4feb-9c4e-9587-9323b28c2e50",
+ "version": "93",
+ "message_id": "SPOTLIGHT_MESSAGE_93",
+ "browser_session_id": "93714e76-9919-ca49-b697-5e7c09a1394f"
+}
+```
+
+## ToastNotification pings
+
+This reports when the user interacts with a toast notification: an OS-level
+toast notification UI affordance or a pop-up OS-level window. Similar policy
+applied as for the What's New panel: client_id is reported in all the
+channels. Currently this is only used in experiments.
+
+```js
+{
+ "experiments": {
+ "exp1": {
+ "branch": "treatment-a"
+ }
+ },
+ "addon_version": "20210115035053",
+ "release_channel": "release",
+ "locale": "en-US",
+ "event": ["IMPRESSION"],
+ "client_id": "c4beb4bf-4feb-9c4e-9587-9323b28c2e50",
+ "version": "86",
+ "message_id": "TOAST_NOTIFICATION_EXAMPLE_ID",
+ "browser_session_id": "93714e76-9919-ca49-b697-5e7c09a1394f"
+}
+```
+
+## Messaging-experiments pings
+
+As the new experiment platform, the Messaging experiment manager is now managing & operating all the experiments of Firefox Messaging System, including the first-run experience (about:welcome), CFR, Whats-new-panel, Moments Page, and Snippets.
+
+### Enrollment & Unenrollment pings
+
+Under the hood, the experiment manager makes use of Normandy API for experiment management (enrollment & unenrollment as well as the corresponding telemetry). Therefore, the enrollment & unenrollment pings are collected through the Normandy counterparts. See [`normandy` category](https://searchfox.org/mozilla-central/source/toolkit/components/telemetry/Events.yaml#441) for more details.
+
+### Experiment reach ping
+
+This records whether a branch's targeting is satisfied for Messaging System experiments. All qualified branch ID(s) will be recorded in the `extra_keys` for each active experiment, and the event `value` will be the experiment ID (i.e. slug).
+
+Unlike other Activity Stream pings, this is a Firefox Events telemetry event, and it is sent only for users enrolled in a Messaging System experiment.
+
+```js
+{
+ "category": "messaging_experiments",
+ "method": "reach",
+ // any of ["cfr", "whats_new_panel", "moments_page", "snippets", "cfr_fxa"]
+ "object": "cfr"
+ "value": "experiment_message_id",
+ "extra_keys": {
+ // A semicolon separated string with all the qualified branch IDs
+ "branches": "control;variant_1;variant_2"
+ }
+}
+```
+
+### Experiment attribute errors
+
+This records whether issues were encountered with any of the targeting attributes used in the experiment enrollment or message targeting.
+Two different types of events are sent: `attribute_error` and `attribute_timeout` along with the attribute that caused it. An attribute
+is a variable inside the JEXL targeting expression that is evaluated client side by the browser.
+
+```js
+{
+ "messaging_experiments",
+ "targeting",
+ "attribute_error", // event
+ "foo", // attribute,
+ "extra_keys": {
+ "source": "message id or experiment slug",
+ },
+},
+{
+ "messaging_experiments",
+ "targeting",
+ "attribute_timeout", // event
+ "bar", // attribute,
+ "extra_keys": {
+ "source": "message id or experiment slug",
+ },
+}
+```
+
+## Firefox Onboarding (about:welcome) pings
+
+These record the telemetry metrics during the Firefox onboarding experience.
+
+### Onboarding impressions
+
+```js
+{
+ "client_id": "26288a14-5cc4-d14f-ae0a-bb01ef45be9c",
+ "version": "76.0a1",
+ "locale": "en-US",
+ "experiments": {},
+ "release_channel": "default",
+ "addon_version": "20200330194034",
+ "message_id": [
+ | "DEFAULT_ABOUTWELCOME"
+ | "DEFAULT_ABOUTWELCOME_AW_GET_STARTED"
+ | "DEFAULT_ABOUTWELCOME_SITES"
+ | "DEFAULT_ABOUTWELCOME_AW_IMPORT_SETTINGS"
+ | "DEFAULT_ABOUTWELCOME_AW_CHOOSE_THEME"
+ | "RTAMO_DEFAULT_WELCOME"
+ ],
+ "event": "IMPRESSION",
+ "browser_session_id": "e7e52665-7db3-f348-9918-e93160eb2ef3",
+ "event_context": { "page": "about:welcome" },
+ "attribution": {
+ "source": "mozilla.org",
+ "medium": "referral",
+ "campaign": "Firefox-Brand-US-Mozilla-Org",
+ "content": "test-addon@github.io",
+ "experiment": "ua-onboarding",
+ "variation": "chrome",
+ "ua": "firefox"
+ }
+}
+```
+
+### Onboarding button clicks
+
+```js
+{
+ "client_id": "26288a14-5cc4-d14f-ae0a-bb01ef45be9c",
+ "version": "76.0a1",
+ "locale": "en-US",
+ "experiments": {},
+ "release_channel": "default",
+ "addon_version": "20200330194034",
+ "message_id": [
+ | "DEFAULT_ABOUTWELCOME_AW_GET_STARTED"
+ | "DEFAULT_ABOUTWELCOME_AW_IMPORT_SETTINGS"
+ | "DEFAULT_ABOUTWELCOME_AW_CHOOSE_THEME"
+ | "RTAMO_DEFAULT_WELCOME"
+ ],
+ "event": "CLICK_BUTTION",
+ "browser_session_id": "e7e52665-7db3-f348-9918-e93160eb2ef3",
+ "event_context": { "page": "about:welcome", "source": ["primary_button" | "secondary_button"] },
+ "attribution": {
+ "source": "mozilla.org",
+ "medium": "referral",
+ "campaign": "Firefox-Brand-US-Mozilla-Org",
+ "content": "test-addon@github.io",
+ "experiment": "ua-onboarding",
+ "variation": "chrome",
+ "ua": "firefox"
+ }
+}
+```
+
+### Onboarding Return-To-AMO install ping
+
+```js
+{
+ "client_id": "26288a14-5cc4-d14f-ae0a-bb01ef45be9c",
+ "version": "76.0a1",
+ "locale": "en-US",
+ "experiments": {},
+ "release_channel": "default",
+ "addon_version": "20200330194034",
+ "message_id": "RTAMO_DEFAULT_WELCOME",
+ "event": "INSTALL",
+ "browser_session_id": "e7e52665-7db3-f348-9918-e93160eb2ef3",
+ "event_context": { "page": "about:welcome", "source": "ADD_EXTENSION_BUTTON" },
+ "attribution": {
+ "source": "mozilla.org",
+ "medium": "referral",
+ "campaign": "Firefox-Brand-US-Mozilla-Org",
+ "content": "test-addon@github.io",
+ "experiment": "ua-onboarding",
+ "variation": "chrome",
+ "ua": "firefox"
+ }
+}
+```
+
+### Onboarding embedded migration interactions
+
+```js
+{
+ "client_id": "26288a14-5cc4-d14f-ae0a-bb01ef45be9c",
+ "version": "76.0a1",
+ "locale": "en-US",
+ "experiments": {},
+ "release_channel": "default",
+ "addon_version": "20200330194034",
+ "message_id": "MR_WELCOME_DEFAULT_0_AW_IMPORT_SETTINGS_EMBEDDED",
+ "event": "CLICK_BUTTION",
+ "browser_session_id": "e7e52665-7db3-f348-9918-e93160eb2ef3",
+ "event_context": {
+ "page": "about:welcome",
+ "source": ["primary_button" | "migrate_close"],
+ }
+}
+```
+
+### Onboarding session end ping
+
+```js
+{
+ "client_id": "26288a14-5cc4-d14f-ae0a-bb01ef45be9c",
+ "version": "76.0a1",
+ "locale": "en-US",
+ "experiments": {},
+ "release_channel": "default",
+ "addon_version": "20200330194034",
+ "message_id": "DEFAULT_ABOUTWELCOME",
+ "event": "SESSION_END",
+ "browser_session_id": "e7e52665-7db3-f348-9918-e93160eb2ef3",
+ "event_context": {
+ "page": "about:welcome",
+ "reason": [
+ | "welcome-window-closed"
+ | "welcome-tab-closed"
+ | "app-shut-down"
+ | "address-bar-navigated"
+ ]
+ },
+ "attribution": {
+ "source": "mozilla.org",
+ "medium": "referral",
+ "campaign": "Firefox-Brand-US-Mozilla-Org",
+ "content": "test-addon@github.io",
+ "experiment": "ua-onboarding",
+ "variation": "chrome",
+ "ua": "firefox"
+ }
+}
+```
+
+## Feature Callout pings
+
+Most interactions and impressions in Feature Callouts are handled by the Onboarding pings above, but since Feature Callouts are inserted into other content, they have some additional capabilities.
+
+### Page event ping for Feature Callouts
+
+Feature Callout messages can include properties to listen for specific events on the host page and perform an action when fired. For example, Feature Callouts pointing to a button can be dismissed when that button is clicked. This metric records the event type, event target, and action.
+
+```js
+{
+ "experiments": {},
+ "locale": "en-US",
+ "version": "107.0a1",
+ "release_channel": "default",
+ "event": "PAGE_EVENT",
+ "event_context": {
+ "action": "DISMISS",
+ "reason": "CLICK",
+ "source": "button.primary#some-button",
+ "page": "about:firefoxview"
+ },
+ "message_id": "FIREFOX_VIEW_TAB_PICKUP_REMINDER",
+ "addon_version": "20221013100028",
+ "client_id": "26288a14-5cc4-d14f-ae0a-bb01ef45be9c",
+ "browser_session_id": "e7e52665-7db3-f348-9918-e93160eb2ef3"
+}
+```
+
+### Feature Callout dismissal
+
+A Feature Callout can be dismissed by clicking its dismiss button directly or pressing the Escape key. With a page event listener, it can also be configured to dismiss the callout when an event in the page happens, such as clicking the target of the callout (see the page event ping above).
+
+```js
+{
+ "experiments": {},
+ "locale": "en-US",
+ "version": "108.0a1",
+ "release_channel": "default",
+ "event": "DISMISS",
+ "event_context": {
+ "source": [
+ "dismiss_button",
+ "KEY_Escape",
+ "PAGE_EVENT:button.primary#some-button"
+ ],
+ "page": ["about:firefoxview", "chrome://browser/content/browser.xhtml"]
+ },
+ "message_id": "some_feature_callout_id",
+ "addon_version": "20221013100028",
+ "client_id": "26288a14-5cc4-d14f-ae0a-bb01ef45be9c",
+ "browser_session_id": "e7e52665-7db3-f348-9918-e93160eb2ef3"
+}
+```
+
+## Sponsored TopSites pings
+
+These record the impression and click pings for the Sponsored TopSites.
+
+### Impression ping for the sponsored TopSites
+
+```js
+{
+ "context_id": "{94642acb-4996-034b-916c-147da723cc41}",
+ "advertiser": "test-advertiser",
+ "tile_id": 42,
+ "source": "newtab",
+ "position": 1,
+ "reporting_url": "https://test.reporting.net/static?id=7RHzfOIWHG7kJnEYgGeuJm7vJ%3DEkiFXwxYIZjF8XgClWfC 8%2B7R4dHQ8zjmENj%3DNwxwz%2FJmdw7R4dHQfz4Z2ZfplnHG3Z5FwqgCfX4ZLafC2mfBINI9HuiF2 z4Z2ZfplnHmcux%3DcvImauiF2zfQlWfpDX7R3%2Bx%3DDuiF2zfLyy",
+ "version": "76.0a1",
+ "locale": "en-US",
+ "release_channel": "default",
+ "experiments": {
+ "exp_id_foo": {
+ "branch": "control"
+ },
+ "exp_id_bar": {
+ "branch": "treatment"
+ }
+ }
+}
+```
+
+### Click ping for the sponsored TopSites
+
+```js
+{
+ "context_id": "{94642acb-4996-034b-916c-147da723cc41}",
+ "tile_id": 42,
+ "source": "newtab",
+ "position": 1,
+ "advertiser": "test-advertiser",
+ "reporting_url": "https://test.reporting.net/ctp?version=16.0.0&key=1598991514900100001.1&ci=15 98991514792.12747&ctag=1598291839300100006&aespFlag=altinst",
+ "version": "76.0a1",
+ "locale": "en-US",
+ "release_channel": "default",
+ "experiments": {
+ "exp_id_foo": {
+ "branch": "control"
+ },
+ "exp_id_bar": {
+ "branch": "treatment"
+ }
+ }
+}
+```
+
+## Glean "newtab" ping
+
+Unlike the other data collections, this is a
+[Glean Ping](https://mozilla.github.io/glean/book/user/pings/index.html)
+that batches events and metadata about newtab sessions.
+
+You can find full documentation about this ping and its contents in
+[its Glean Dictionary entry](https://dictionary.telemetry.mozilla.org/apps/firefox_desktop/pings/newtab).
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-11 05:36:38 +0000