@Vítor Rated 3 out of 5 stars
Since you've fixed it, are you going to release an update? *anxiously waiting* XDThis review is for a previous version of the add-on (188.8.131.52-signed.1-signed). This user has other reviews of this add-on.
I'm not sure if I understood you. Version 1.5.4 is not working for you? I tested it with Firefox 4.0 on GNU/Linux and it worked. Could you try to uninstall and reinstall it?