Hello! I really like this extension, but I have a tiny issue. For some reason on firefox version 52, the open in new tab icon when you right click on a link on a website, appears black as you can see on the following image:
If I right click on a link on the favorites toolbar, the open in new tab icon appears correctly.
Before the same happened with the back and forward buttons too, but I decided to hide those options on the right click menu.
It doesn't matters if I change the iconset. the open in new tab icon keeps appearing in black.