Simple Site Blocker for Firefox Publisher's description
from Jeff Yan
A simple site blocker with whitelist features.
Inspired by the simple site blocker from Chrome. The existing site blockers are all too bloated or are missing the simple whitelist feature. This addon tries to be as simple as possible. There are no configurations, just one text box where you enter which sites you would like to block.
When you try to visit a site in your block list, this addon will automatically redirect to a blank page.
The block list supports white list and is domain based rather than keyword based. It aims for speed and simplicity. It is very fast.
System Requirements:Firefox 1.5 and later
Program Release Status: Minor Update
Program Install Support: Install and Uninstall