Useful Firefox Plugin du jour

This one’s been nagging me for a while. When doing work on CONGO, I spend a lot of time editing templates and stylesheets within <textarea> blocks. This is all fine and dandy, except Firefox (and most other web browsers) consider the ‘tab’ key to mean “move to the next input field”. Makes it very hard to edit XML or HTML in a textarea when you can’t actually indent the text.
So I was mighty happy to find tabinta, a Firefox plugin that simply allows the tab key to type a ‘tab’ when editing a textarea. Nothing fancy, nothing major, but ZOMG what a difference when editing content.