It... doesn't seem to be working. I dunno if that's because of Tumblr's recent updates, or anything else. I would appreciate some help, the only thing I did was hit the 'add to firefox' button.
Edit: Thanks for the help! Now I've gotten it to work, 5 stars!
You can customise the extension's functionality through the popup menu opened by clicking on the extension's icon in the browser toolbar or extension drop-down list.
