This is one of the best tools for blocking those annoying ransom ware pages.

Poderia fechar a página no lugar de só bloquear, aí seria perfeito

used to work, now it just deletes the new sites you add, so it doesn't block anything anymore.

Bad ux design. The blocked list is hard to find. White list / Black list are not clear enough.

It used to work, but now it doesn't. I set it to block a site, and within 5 seconds the site will unblock itself and it will forget my blocked sites list. I've tried uninstalling BlockSite, Firefox, deleting all of Firefox's data and restarting my PC, but the problem still persists.

It just deletes my list of blocked websites over and over again.

Beware. This is SPYWARE. Both my credit cards were compromised the short time I had this extension on.

It helps me a kot for blocking sites at my work time and study time loved it

Saved My life.
Thanks

Love this add on, I am easily distracted but now I've put another level of discipline between the web and my ceaselessly wandering mind. Thanks.

Great! It blocks and blocks and blocks. Could (only) be better if it blocked the side-bar also!