I put together some simple commands to install improved firefox buttons in ubuntu. I take no credit for creating the icons or the script, just making it uber-easy to install by feeding you the exact commands. Originally from this thread.
There is a much improved version out, and I am updating the commands to match. Here are the new commands:
sudo tar -xf firefox_widgets_2.7.tar.bz2
and change the install location to ‘/opt/swiftfox’ for swiftfox.