Sync Disney+ via the page media player API (precise time + seek)

Disney+'s <video> is blob-relative (unusable as an absolute clock) and its
scrubber aria-value freezes during playback, so DOM scraping lagged and the
+/-10s button seek could neither reach far targets nor land precisely. The
real player hangs off the <disney-web-player> custom element as
`.mediaPlayer`, exposing seek(ms) and timeline.info (playhead/duration ms).

Since the isolated content world can't read that page object, route it
through the existing MAIN-world page-API bridge (as Netflix already does):

- page-api-seek-overrides.js: register a 'disney' provider.
- background.js installPageApiSeekBridge: seek Disney via mediaPlayer.seek(),
  and post the exact playhead/duration (seconds) to the content world every
  250ms. Both are gated on provider === 'disney'; Netflix path unchanged.
- content.js: cache the pushed playhead, prefer it in getDisneyPlusTimeline
  (DOM scraping stays as fallback), and check the page-API seek first in
  seekVideo. Outcome is identical for Netflix and generic sites.

Verified live on Disney+: reported time matches the player exactly and
seek lands within ~1s of the target.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

extension/content.js

@@ -63,7 +63,21 @@
     // Suppresses native event reporting after a programmatic action.
 
     // Each entry is a per-type timer (key = 'playing'|'paused'|'seek').
-
+
+    // While a timer exists, matching native events are consumed and not relayed.
+
+    // Timers self-clean after 300ms if the native event never fires.
+
+    let _suppressTimers = {};
+
+
+
+    function _setSuppress(state) {
+
+        if (_suppressTimers[state]) clearTimeout(_suppressTimers[state]);
+
+        _suppressTimers[state] = setTimeout(() => {
+
             delete _suppressTimers[state];
 
         }, 300);
@@ -276,7 +290,14 @@
     function getDisneyPlusSeekButtonLabels() {
         if (!isDisneyPlusHost() || typeof document === 'undefined') return [];
         return querySelectorAllShadow('button,[role="button"]')
-            .map(getElementLabel)
+            .map(getElementLabel)
+            .filter(Boolean)
+            .slice(0, 20);
+    }
+
+    function clickDisneyPlusRelativeSeek(delta) {
+        if (!isDisneyPlusHost() || !Number.isFinite(delta) || Math.abs(delta) < 1 || typeof document === 'undefined') return false;
+        const backward = delta < 0;
         const candidates = querySelectorAllShadow('button,[role="button"]');
         const backRe = /rewind|backward|back\b|zurück|zurueck|rück|rueck|retour|recul|retroced|atrás|voltar|indietro/i;
         const forwardRe = /forward|ahead|skip|vorwärts|vorwaerts|vorsp|weiter|avancer|adelant|avançar|avancar|avanti/i;
@@ -398,26 +419,28 @@
             name: 'disneyplus-timeline-and-buttons',
             key: 'disneyPlus',
             urls: ['disneyplus.com'],
-            matches() { return matchesPlayerUrls(this.urls); },
-            getTimeline: getDisneyPlusTimeline,
-            clickRelativeSeek: clickDisneyPlusRelativeSeek,
-            getDebug(video) {
-                return {
-                    name: this.name,
-                    key: 'disneyPlus',
-                    urls: this.urls,
-                    timeline: getDisneyPlusTimeline(video),
-                    timelineCandidates: lastDisneyPlusTimelineCandidates,
-                    seekButtons: getDisneyPlusSeekButtonLabels()
-                };
-            }
-        }];
-    }
-
-    function getActiveSiteQuirk() {
-        return getSiteQuirkAdapters().find(adapter => adapter.matches()) || null;
-    }
-
+            matches() { return matchesPlayerUrls(this.urls); },
+            getTimeline: getDisneyPlusTimeline,
+            clickRelativeSeek: clickDisneyPlusRelativeSeek,
+            getDebug(video) {
+                return {
+                    name: this.name,
+                    key: 'disneyPlus',
+                    urls: this.urls,
+                    timeline: getDisneyPlusTimeline(video),
+                    timelineCandidates: lastDisneyPlusTimelineCandidates,
+                    seekButtons: getDisneyPlusSeekButtonLabels()
+                };
+            }
+        }];
+    }
+
+    function getActiveSiteQuirk() {
+        return getSiteQuirkAdapters().find(adapter => adapter.matches()) || null;
+    }
+
+    function getSiteQuirkTimeline(video) {
+        const adapter = getActiveSiteQuirk();
         return adapter ? adapter.getTimeline(video) : null;
     }