[ALUG] How to tell what extensions are installed without running Firefox?

This may seem to be a silly question, but...... I want to remember the name of an addon/extension I have installed on my home Firefox. I have ssh access to my home system. So, how can I tell what extensions are installed, I can't see any obvious clues in the $HOME/.mozilla/default hierarchy. It's not a sensible answer to run Firefox remotely, it'll take all morning to even start up across the internet connection from here to home. -- Chris Green