Very Simple New Tab por maelic

Simple New Tab replaces Firefox's new tab page with a clean, customizable speed-dial dashboard.

Features:
- Add, edit, delete, reorder, and open shortcuts
- Add the current page from the toolbar popup
- First-run setup with starter shortcuts
- Light, dark, and system theme support
- Custom tile colors, text colors, shortcut size, spacing, columns, and vertical position
- Background color, image URL, SVG, and local image support
- Icon discovery from page metadata, manifests, common favicon paths, and favicon fallback
- Import/export backups for settings and shortcuts
- Browser sync for shortcut metadata and settings on desktop Firefox

Notes:
- Firefox sync and Chromium sync are separate browser services.
- Uploaded raster images are stored locally on the device and do not sync automatically.
- The extension does not collect user data.