The button in the toolbar Noté 4 sur 5 étoiles

Hi, I have just installed this ad-on. How do I display button on the toolbar? In "Appearance", by selecting "Show Imtranslator button on toolbar", nothing happens. For the rest all seems fine (but it s just the first impression). Thanks for help. (browser = Firefox 30)

Okay.. the problem is solved: by clicking on the three lines on the right hand side of the browser, you have to select Personalize, then, by right clicking on the Imtranslator icon, you have to choose "add to toolbar..."
But why nothing happens if I use the above indicated Options of the add-on?

Cette critique concerne une version précédente du module (7.9.1-signed).