It is impressive. I use it to block adult sites and it works perfectly. Just add few matching keywords and boom. It works all the time.

Works as advertised. easy to set up and blocking reliably

Simple and effective. Free as in beer. Preferred alternative to paid ones.

amazing

Hate it because it works so well. Was just abt to open an FB link when it blocked me because my timer was over. But srsly, it works great. No worries abt its access to all data (browse reddit for explanations abt this).

This add-on works even while you minimize Firefox or turn off your smartphone monitor. Therefore, the time limit is reached even though you have stopped browsing the site.

Great add on. Simple and it does the job. Thanks a lot for making this.

Incredible improvement in managing my Instagram feed addiction

Works perfectly. This app has helped me a lot!

Very nice extension