Works with FF 3.5.7 if manually installed Rated 5 out of 5 stars

I find this extension very useful so was disappointed that it seemed to be incompatible with the latest version of Firefox.

I tried without success to install the extension on a new computer using the same version of Firefox (3.5.7) on which the extension was working on another computer. I copied the contents of:
(or a similar folder) between computers and the extension seems to work fine. It seems that it won't install on FF3.5.7 but works nevertheless if manually installed.

This review is for a previous version of the add-on (0.5).