What's new in 1.5.1:

• Gemini model selector: the settings page now offers a dropdown with
Google's three alias IDs — Gemini Flash-Lite (default), Gemini Flash,
and Gemini Pro. "Custom model ID…" still accepts any model ID.
• New default model: gemini-flash-lite-latest. The alias always points
to the newest Flash-Lite release, so the default keeps working when
Google retires a model version. It also has the most generous
free-tier quota; gemini-flash-latest allows only 20 requests per day
on the free tier.
• Actionable errors: when Gemini answers 404 (model retired),
429 (daily quota used up), or 503 (overloaded), the error message now
tells you the fix — pick a different model in the settings.
Localized in all 11 languages.

Existing settings are kept: a previously stored model appears under
"Custom model ID…".

New transcript engine: the add-on now reads the caption track directly from the YouTube player and fetches the transcript silently — no transcript panel opens, no description needs expanding. Summaries now include the video description on every layout. Google retired gemini-2.5-flash (API returns 404); the default model is now gemini-3.5-flash and the model ID is configurable on the add-on settings page, so future retirements no longer require an update. If a model answers 503 "high demand", gemini-3.1-flash-lite is a working fallback. Groundwork for m.youtube.com support included.

Privacy
- Added telemetry opt-out checkbox in extension settings
- Anonymous usage statistics are enabled by default and can be disabled in the extension settings

UX
- API key field in the settings modal is now hidden once a valid key is stored — less clutter
- If the API key is rejected by Gemini (401/403), the key field reappears automatically with a warning
- Quota exceeded: button now shows a live countdown instead of just an error message

Compatibility
- Raised minimum Firefox version to 140 (required for data_collection_permissions)
- Raised minimum Firefox for Android version to 142

Internals
- Footer text now matches the chosen response language, not the UI language