Switched to this from the ImpulseBlocker addon. I can set times when I want to be productive and disable social media websites during that times, also set times for sleep and for weekends, that's pretty easy to configure. Overriding the self-set rules is hard and that is important. ImpulseBlocker had this "disable for 5 minutes" button and I used that way too much. Synchronization over your firefox sync account seems to work for me as well, though it is still in beta. This helps me a lot during this Covid19-induced home-office.

This tool has been the biggest help. Clearly, the author of this tool understands the doctrine of total depravity. :-)

Edit: lol nvm i didnt realize there was a website with a FAQ, it's crazy how powerful this is
---original: these things exist!---
I wish there was a whitelist feature, because sometimes wikipedia and a bunch of other sites i can't list all of are useful for work and other times they're a distraction.
Also, it can't kick me off of a site that im on, it only blocks it when it refreshes. Tumblr is an endless scroll site and if i run out of time it doesn't kick me off until i manually refresh it

Me writing this review is a sign that it is working. I would definitely be on social media if it weren't for this add-on. I used the Stayfocusd extention for Chrome previously and this add-on is a perfect replacement.

Simple to use, has a number of powerful options, and a pleasant but unobtrusive default "sorry, can't visit" screen. Works great!

So great. Can't live without it now.

I have been using this for years, and I was delighted when the author took the time to rewrite the extension to work with newer Firefox versions, and with Chromium browsers too! Well done! It also works with Firefox Sync (go its settings to enable that). The settings are a bit hard to understand at first, but there many more settings than anything else that I've tried.

The only thing that it lacks is that the settings page is not suitable for small screens on Firefox for Android.

This is the first browser extension that I have ever donated to.

Made an account just so I could rate this.

The delay page really is the killer feature for me. I can set the timer to just long enough so that I stop the impulsion, but just short enough so that if I really need to access something during the block period I can, if I feel like waiting (which I usually don't). Alt-tabbing also cancels the countdown by default. The statistics breakdown for each blocking group is also brilliant.

There's a lot more features to this extension I haven't tried, but for now the way I have it set up works really well.

All of this under a copyleft license means a big thumbs up from me. I can't give enough praise!

Finally a blocking extension that has everything! Clever grouping of sites with functionality for: delaying access, setting a max time and setting a schedule. And even if one site is in several groups and has multiple rules tied to it, the blocking rules interact and work together as one would expect! Very happy with this.

this is my first review and I consider this extension one of the best ;

So so so useful if you have trouble staying off distracting web pages. Works flawlessly and is fairly straightforward to configure and use.