Some forums I use don't have fixed backgrounds and I find it dizzying. I was hoping to change that with the TamperMonkey plugin but it requires scripts and I don't know how to create scripts. I found one similar albeit older topic and the scripts didn't work.
So, say I want to turn something like this:
body {background: url('image') fixed;}
or body {background-image: url('image');background-attachment: fixed;}
Into a script. How would I go about that? I use Firefox, not sure if that's important.