Rated 5 out of 5 stars

Oh yeah... thanks for info :)

This review is for a previous version of the add-on (2.10.3). 

Rated 4 out of 5 stars

On Extension this is reported as "Obsolete".... it's normal ?

This review is for a previous version of the add-on (2.10.3). 

The word I see is "Legacy". Maybe a difference in localization. Anyway, it needs to be updated to become a WebExtension in order to continue to be supported by Firefox, as all extensions need to be, if they haven't already. Support for legacy extensions is set to be dropped in November. I do intend to make that update.