Enhancements
- Dual engine support: choose on-device Whisper or cloud AssemblyAI; store API key; optional prefetch/cache of default model.
- Adaptive VAD and stop logic: smarter noise floor, early “no speech” stop, optional 5s hard cap toggle, grace-window toggle.
- Per-site overrides include engine selection (plus model/language/timeout); popup auto-hides model when cloud engine is chosen and auto-saves changes.
- Options UI: engine card, dev toggles (hide model sections, hide favicons, hard cap, grace, cache model), “Save all” + factory reset; options auto-unload when idle.
- Action icon UX: download/cache/done/cancel badges; cached badge on reuse; brief held error state.

Fixes
- Better cancel/stale-session handling and tighter processing timeout to avoid hangs.
- Stricter handling of silent/too-short/pathological audio as “no audio/unintelligible,” reducing bad results.
- Processing fallback timer and GC/reload behavior to prevent long-running or stuck states.
- Basically its less likely to break....

Updated Garbage Collector (GC):
Idle memory usage is now at ~4MB (after being cleared see below) originally from 1GB
The extension clears cache after 30 seconds of idle and after closing the tab or navigating to a different site.