It’s All Text! is one of my most-used Firefox add-ons and recently it’s been upgraded to run on 3.0b4.
Edit textareas using an external editor, because it’s all text!
Right click on a textarea, select “It’s All Text!” and edit the text in the editor of your choice.
Alternatively, click on the edit buttons added for your convenience. Right click on the edit buttons for even more options, including preferences.
There are good reasons why you want to use your own favorite text editor to do text editing, and this add-on makes the process extremely easy (no cut and paste needed). But my initial reason was to avoid the “back” button: on my ThinkPad, it’s right next to the arrow keys and if you happen to hit it by mistake, whoosh, all your text is gone…
Highly recommended.
P.S. Of course this post and many others are written using it. 
