[opensource] Awesome Firefox Plugins

[Jeffrey D. Holycross]

Realize this thread is a little dead, but my personal favorite at the 
moment is Split Browser: https://addons.mozilla.org/en-US/firefox/addon/4287

It allows you to split the current browser window.  You can even create 
tabs within that split, though it's more difficult than it probably 
should be.  However, it's great for copying data from one site into 
another, especially in a form (something I've been having to do way too 
much lately, one database to another).

Also want to agree with the support for IETab and Web Developer.

Jeff