Franspose per o61iqz

Firefox extension that transposes pitch and adjusts playback speed for audio and video on the page, with a small transport bar (play/pause, ±1s/±5s). Settings are remembered per page URL in browser.storage.local.

This branch (no-marker-loop) is the 1.0.0-n line: it does not include marker bookmarks or A-B loop playback.

== Features ==

• Semitones (−12 … +12) and fine tune (cents) with Signalsmith Stretch audio worklet
• Playback speed (0.25× … 2×) with pitch handling via the stretch pipeline.
• Effects on/off and reset for the current site.
• Light/dark theme (popup + settings); theme preference is stored globally.
• Settings page: clear all per-site saved transpose data; diagnostics (version / storage counts only, no URL dump).

Data: Nothing is sent to a remote server; data stays in the browser.