Rated 4 out of 5 stars

Very useful extension.
The latest version (1.3.1) add flexibility: usage of Add-on bar rather than status bar (for Firefox versions >= 4).

By the way, how can I submit french localization ?

This review is for a previous version of the add-on (1.0.1). 

Please contribute to localization

I knew there might be problems with obsolete localizations, but I think it is always better to have half the messages in your language, half in a foreign one, than it is to have them all in a foreign language (English).
During development here, English labels were displayed whenever their localized counterparts were not present, so I assumed it was safe to include partial localizations. Apparently it was a mistake, so we'll remove them and list them as needing an update.
From now on, please contact us directly to report bugs instead of commenting here -- it's more likely that we read what you have to say.