Automatically Copy Highlighted Text In Firefox

If you do a lot of copy-pasting from Firefox, an add-on you simply must have is AutoCopy:

Select text and it’s automatically copied to the clipboard. Like Linux or mIRC.

Simple enough. Additionally, if you only want to get the plain text instead of the formatted text, this extension works with the Copy Plain Text extension to accomplish this.

This is an awesome combination which should be able to handle just about all your copy-paste needs… for text