THE BEST BLOCKER, i have used.....

Does not save blocked web addresses between sessions.

Works very well. Extremely pleased

thumbs up for blocksite!

Gets the job done. Exactly what I needed with no fuss.

It does a decent job of blocking distracting sites for a specified time range, but once the interval is over, I can access the sites themselves, but any links I try to open within the sites are still blocked (for example, I can access Facebook, but can't click any pages in my feed). How can I fix this without disabling the add-on altogether?

Does what it should! I love it!

I really liked this add-on for a day. Then I opened two windows on firefox and add-on was completly useles on the other window. I was able to reach blocked web sites. While this bug remains one star out of five will remain too.

good to use!!!

Quite good, but I'm affraid there's a bug :
In "white list mode" [not so easy to find out because list still appears as "block sites" ;-) ] the protection is not active any more when one opens a new (private) window !
Hope you'll find a patch soon :-p Thanks you for this tool anyway.

en ocaciones no funciona....y no se explica como bloquear paguinas por genero (porno).