ReadLater от Salik Khan

ReadLater is a minimal reading queue for Firefox.

When you find something worth reading but don't have time, save it with one click or Alt+Shift+S (Option+Shift+S on Mac). ReadLater stores the page on your device and helps you come back to it: what to read next, how long it takes, and where you left off.

What it does:
- Save any page via the toolbar button, right-click menu, or keyboard shortcut
- Save highlighted text, and see it highlighted again when you return
- Detect duplicates so you never save the same page twice
- Estimate reading time and track progress, so you can continue where you left off
- Suggest what to read next with simple on-device rules
- Filter by available time: 5, 10, 20, or 30+ minutes
- Add notes, tags, and categories; search everything; archive finished reads
- Export your library as JSON or delete everything at any time

Privacy:
- No accounts, no cloud, no analytics, no tracking
- The extension makes no network requests; your library never leaves this browser
- Works fully offline