The best Link checker for firefox

To do this You will need GreaseMonkey addon for firefox

Code:

https://addons.mozilla.org/en-US/firefox/addon/748

Then Open this site

Code:

http://userscripts.org/scripts/show/29222

Click on Install. It will install the script.

Whenever theres is text like rapidshare.com, it automatically checks the links. If links exist it is highlighted green,if doesn't then Red.

Very useful Script.