Backed out changeset 9f7039b0b86c (bug 1772546) as requested by the dev. CLOSED TREE

toolkit/actors/PictureInPictureChild.jsm

@@ -1296,7 +1296,6 @@ class PictureInPictureToggleChild extends JSWindowActorChild {
 }
 
 class PictureInPictureChild extends JSWindowActorChild {
-  #subtitlesEnabled = false;
   // A weak reference to this PiP window's video element
   weakVideo = null;
 
@@ -1478,10 +1477,6 @@ class PictureInPictureChild extends JSWindowActorChild {
       return;
     }
 
-    if (!this.isSubtitlesEnabled) {
-      this.isSubtitlesEnabled = true;
-    }
-
     let allCuesArray = [...textTrackCues];
     // Re-order cues
     this.getOrderedWebVTTCues(allCuesArray);
@@ -2249,26 +2244,6 @@ class PictureInPictureChild extends JSWindowActorChild {
       /* ignore any exception from setting video.currentTime */
     }
   }
-
-  get isSubtitlesEnabled() {
-    return this.#subtitlesEnabled;
-  }
-
-  set isSubtitlesEnabled(val) {
-    if (val) {
-      Services.telemetry.recordEvent(
-        "pictureinpicture",
-        "subtitles_shown",
-        "subtitles",
-        null,
-        {
-          webVTTSubtitles: (!!this.getWeakVideo().textTracks
-            ?.length).toString(),
-        }
-      );
-    }
-    this.#subtitlesEnabled = val;
-  }
 }
 
 /**
@@ -2434,9 +2409,6 @@ class PictureInPictureChildVideoWrapper {
    * @param text The captions to be shown on the PiP window
    */
   updatePiPTextTracks(text) {
-    if (!this.#PictureInPictureChild.isSubtitlesEnabled) {
-      this.#PictureInPictureChild.isSubtitlesEnabled = true;
-    }
     let pipWindowTracksContainer = this.#PictureInPictureChild.document.getElementById(
       "texttracks"
     );

toolkit/components/telemetry/Events.yaml

@@ -2609,23 +2609,6 @@ pictureinpicture:
       - 1756703
     expiry_version: "never"
     release_channel_collection: opt-out
-  subtitles_shown:
-    objects: ["subtitles"]
-    description: >
-      Records if subtitles are shown in the Picture-in-Picture window.
-    extra_keys:
-      webVTTSubtitles: Will be true or false
-    notification_emails:
-      - mconley@mozilla.com
-      - mhowell@mozilla.com
-    products:
-      - "firefox"
-    record_in_processes:
-      - "content"
-    bug_numbers:
-      - 1772546
-    expiry_version: "never"
-    release_channel_collection: opt-out
 
 pictureinpicture.settings:
   enable: