Rated 5 out of 5 stars

Plain text uses another extension that's broken. Use this version to make it work again:
https://addons.mozilla.org/en-US/firefox/addon/129688/
If you want the Options menu to work, you gotta install from the Multiupload link posted in the description. Works perfectly!

This review is for a previous version of the add-on (1.0.1.1-signed.1-signed).