i love this its great a website called 403 forbidden or something always used to come up witch had pictures of disgusting things so my brothers/cousins and friends used to laugh at me and i got in big trouble, it used to automatically open and thanks to this it'll never come up again thanks allot its great that's why i rated it A BIG FIVE

very nice

Works very well.

Doesnt save the blocked sites.If I close Firefox then re-open it I have to import the block sites again

It's really great! One thing: I have not been able to figure out the active time intervals. Maybe it's me or maybe it's not working. Other than that, this is great!

for simple on/off blocking this is fine, but the scheduling functionality does not work

good

Does everything it says it does perfectly.

It works.

It doesn't work. That's all.

I'm using this extension to prevent myself from wasting time in social media when I should be thinking about my work. Hopefully I resist the temptation to disable this addon :P

very nice.

Excellent! I'm using this to never let anything Yahoo onto my computer. They have snuck in one time too many.

Works fine, but only if ONE firefox window is open. It works on only one window when multiple firefox windows are open.

Its really awesome. I am now less distracted and focus on my work. Thanks a lot.

Very helpful.