Is there a way to customize keyboard shortcuts through '''about:'''? If there is, it should be explained here, or if it's explained somewhere else, there should be a link here to that page. There are some utilities that are supposed to do that. One of them worked through '''Tools > Options''', which doesn't exist anymore. I can't figure out how to use it. Another add-on lets you add shortcuts, but doesn't let you delete an exiting shortcut. I want to remove the keyboard shortcut for '''Ctrl+Shift+A'''. I have no idea how to do it.