Fixed duplicate Picture-in-Picture buttons when opening videos from YouTube hover previews. PiP controls no longer appear on preview videos, stale preview buttons are removed during YouTube navigation, and previews are excluded from the keyboard shortcut’s video selection. Also updated settings text for better cross-browser wording.

Added support for Firefox and Firefox-based desktop browsers using Gecko 153 or newer.

Also added correctly sized browser icons, an explicit no-data-collection declaration, Firefox compatibility testing, and Mozilla package validation.