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!

doesn't even block sites in Mozilla Firefox (for Developers) whereas in Chrome it works fine. Sad.

When update list of blocked site gone.

it blocks sites even if they are not on the list. Totally unrelated sites. Weird but it makes the add on unusable to me :/

Though I am aware of accusations of data mining against this developer, the extension is too valuable to sacrifice.