Lim by Lim

Lim is a RegEx-based time limit extension for Firefox. Block websites en masse with the power of RegEx, or set website-specific limits by simply typing in the domain. Be as creative as you want about how you block websites — it's up to you!

Key features:
- Delayed Delete: trying to delete a limit? You'll have to wait until the next day to confirm it!
- Detailed Documentation: every feature has a web page to explain it.
- Usage: Lim gives you a daily breakdown of time spent across websites.