i had installed this add-on and it worked. a few days later, i was working in my bank account and a new firefox window auto-opened. i thought it was a virus. this add-on had opened it and was "updating" me on issues with the add-on and requesting money. when i tried to close this auto open firefox window, it popped up a "buy me a coffee" box, which i had to manually close before i could close the window. basic virus behavior - auto opens with a popup while i'm in my bank - c'mon man. immediate uninstall. also, not very comforting to know that firefox let's it's addon programmers do this. if firefox allows programmers to do that, they could have access to everything on my machine. awful stuff.