First of all, I love this addon. I couldn't surf the web without it, which is why I think it's imperative that it gets fixed. The Zoom In (+) and Zoom out (-) buttons on the toolbar need to be restored. When I use the mousewheel to zoom in, it zooms in, but I "try" to zoom out, it "zooms in" even more.
I thought that the best thing to do was to try an older version of both Firefox and the addon, and it worked for a couple of weeks, but all of sudden, it just stopped working. Also, same for the text settings when you click on the icon.
Please get this working again.
Update: apparently, that "unable to zoom out" thing only applies to some sites, but not all of them. For example, it works here on this addon page, but NOT on Google.com