It works well enough - I guess, but with two major coded-on-purpose issues that their wiki provides no help with. First of all - it's using the browser language with visibly no option to change the language in the add-on - which leads to a mix of two languages (cause the translation isn't complete) and some stuff being just translated in a way that makes it hard to understand. Second, oh my dear god, guys, you likely used paste function to make the damn add-on, why would you block it and force some "inject" tool instead that just doesn't allow me to paste what I need, either removing part of it or simply erroring out? Copy-paste is like THE THING many use for dealing with any code - including html and css - and you just went and purposefully broken it. That's just... all I can call it is "a one and a half brain cell move" cause you gonna need at least two working brain cells to see how wrong it is to do what you did. It's insane that anyone in their mind would do something like it. Just use one of the million unused key combos there are and leave the ctrl+v alone.