New "not crappy" icon

[GJRobert]

I second to a new icon for this addon since this is all what we've got for Firefox Quantum, and this work is still appreciated. In fact, I'm quite glad that the modified title prefix survives quitting and restarting the app!

Hmm good question, maybe this one? https://www.needpix.com/photo/594642/write-pen-window-icon-popup-mdi-app-free-vector-graphics

Originally posted by @motin in #44 (comment)