Snipper by Heiko

Snipper is a lightweight Firefox extension for collecting text as you browse.
Highlight any text on a webpage, save it instantly, and keep browsing. Snipper stores each snippet with its source, timestamp, and context, so you can return to it later without losing where it came from.
Clicking a saved snippet reopens the original page and automatically highlights the exact section it was taken from — perfect for research, comparison, writing, or shopping.
Snipper works completely offline using local storage. Optional Firefox Sync lets you share snippets across devices when you want, with a subtle visual indicator showing when sync is active.
Features
Save highlighted text from any website
Reopen the original page and jump to the highlighted section
Works fully offline (local storage)
Optional Firefox Sync across devices
Light, dark, or system theme support
Export snippets as RTF, TXT, CSV, Markdown, or JSON
Automatic snippet deletion: manual, on app close, after 7 days, or after 30 days
Minimal, distraction-free interface
Snipper is designed to stay out of your way — no accounts required, no clutter, no lock-in. Your snippets remain yours.

Features:
- Right-click to save any selected text
- Snippets include source URL, page title and time
- Click a snippet's source to revisit the page
- Export to Markdown, Plain Text, RTF, CSV, or JSON
- Auto-delete options: keep forever, 7 days, 30 days, or clear on browser close
- Light and dark theme support
- No account required — your data stays on your device

Perfect for research, shopping comparisons, collecting quotes, or saving bits of information you'll need later.