Nice and simple. Just works. The list of sites to block, reached by editing the add-on's preferences, is crowded like the 1990s Yahoo.com homepage and makes my eyes want to skip over it, so i have to sort of force myself to recall that the place to add new sites to block is just above that, but other than that cosmetic quibble this extension simply does exactly as it says — blocks sites — without the temptation of setting times that sites are available which leads to wasting time tweaking settings.

Blocks the sites you want to block and requires fewer permissions than the other site blocking extensions; simple to use.

It effectively blocks the sites instead of a different BlockSite extension I tried which failed many times. It's simple and works! :-)

SafeMode showed FF getting hit by first hijacker in many years.
The sleazy "myfirsttab.com" search settings redirect con
Immediately added it to your Block Sites along with its very long link to the adware/crapware sites:
us.search.yahoo.com/* -and- www.reimageplus.com/*
Bang, dead. At least Bing Searches are no longer sent to those intrusive Yahoo SOBs!
Now I have to waste an hour or more on a stinking Firefox refresh to hopefully purge the hijacker.
Thanks for giving us the ability to create a blacklist WITH re-redirects!
Very handy little add-on.

Very good add-on, better than the more famous one

works in normal window, new window, privacy window. nice addon

Good. Does what it is supossed to do. Easy to use.

add-ons that must be owned in Firefox

This is the best addon to block url. Awesome and works as expected. I can add redirect pages too and it works well. :) Cheers to the developers !

leaves blacklisted pages open,should either close them or not let blocked page open. worthless.

works perfectly and is easy to use.

I just want to blocks sites that I regularly visit. I want to learn not waste my time!

I cant use it

Doesn't work - doesn't block content loaded by scripts.

I was using this to block wiki hits on my searches and it was working great, but now it seems to have turned itself off. Or more likely I did something to turn it off. (idiots use wiki)

is good if you block pages the bad is that you can enter add-ons and disable or delete it
(es buena si bloquea paginas lo malo es que pueden ingresar a complementos y desactivarlo o eliminarlo)

Doesn't work. Doesn't block sites. You add them to the list and the pop-unders keep apperaring anyway, so you add to the Blocksite list again and get the message: This is already added to the list." Really? Then why do you keep allowing it to open up again if it's already added to the list? Plus, why are you forcing me to give it a rating star by making it a 'required field'? That's cheating. You are stealing reviews. This is a negative review not a positive one. I don;t want to add a star I want to remove the stars. Stop cheating on the reviews, guys.
BEWARE: In order to post a review they force you to give them a star, which is simply cheating and lying to people. Blocksite needs to fake its ratings.

Nice and easy.
It would be nice if the settings can be protected with a password.
It is a matter of time before my kids figure out and delete the extension or remove the settings:)

stopped working. Won't let me copy and paste urls anymore.

I'm pretty happy with it, but please add the options to import/export list of blocked sites.
if you want to use the extension on another computer you have to re-type all links cause you can't even use copy/paste, this is unacceptable.
PLEASE correct the issue!

Excelente. Para o que se propõe é altamente funcional. Obrigado.

Doesn't block anything. Otherwise, nice.