Version 2.5.11

Fixes
- Font detection on sites whose fonts declare a generated fallback family (Astro, Next.js): the sample used to be sent as tiny generic letters, so results were wrong. The sample is now drawn directly on a canvas with the page's own font.
- Fonts loaded through the FontFace API are detected as well.
- A warning is shown when the page font is not available in your browser (system font from another OS, or not loaded by the page), instead of silently identifying the fallback font.
- Font history: clicking a font re-identifies that font, not the previous one.
- Custom sample text: invalid input now shows the error instead of "Settings updated"; letters and digits only (2–8 characters).
- Font details: the preview now uses the correct weight and style.
- Longer time limit for identification, with progress messages.
- The toolbar button also works on tabs opened before the add-on was installed or updated.

Improvements
- Popup fits smaller screens (laptops at 768 px), Escape closes it, keyboard focus is visible.
- Less work on every page: no more DOM cloning on hover and no global mutation observer.
- Removed html2canvas and unused code (~45 KB less injected into pages).
- Permissions narrowed: host access only to whatfontis.com.