Noté 3 sur 5 étoiles
Disappeared completely when I updated to FF (Palemoon) v20.2. Tried a few tweaks, including reinstalling it, this worked in the past, but no effect so far.
When it worked, it never showed the context menu when viewing a plain image rather than HTML page with an image embedded. Tineye reverse image search works under that condition so it should be doable.