release(firefox): closes #1 (b893a79)
- Added persisted Firefox settings for per-site widening, an always-on mode, badge updates, and shortcut-driven activation routed through runtime messages. F:background.js†L22-L199
- Updated the popup to let Firefox users toggle the current site, control the always-on mode, capture a keyboard shortcut, and review saved sites. F:popup.js†L1-L139
- Introduced background unit tests covering hostname parsing, HTTP checks, and settings merges to validate Firefox behavior. F:test/background.test.js†L1-L91

[1.0.2] Added more tags to the query selector, extended widing logic
[1.0.1] Added icons to the extension

[1.0.1] Added icons to the extension