Noté 5 sur 5 étoiles

Thanks for answering,

Do you have in your plans to make it to work with FF 57?

Cette critique concerne une version précédente du module (0.5.5). 

If the WebExtensions API doesn't support it, nothing I can do.

As long as FF keeps support for UserChrome.css, you can still manually add the CSS (just stick the mosaic in the same folder as userchrome.css).

Noté 5 sur 5 étoiles

Not compatible with vesion 57 :(
Do you have in your plans to make it to work with FF 57?

Cette critique concerne une version précédente du module (0.5.5). 

Last time I checked styling menuitems/buttons wasn't allowed with WebExtensions :(