That's what I'm talking about, it's way too inconvenient to have to enter that clunky 'Customise' window (and then close it ooff) just in order to drag an icon

That's what I'm talking about, it's way too inconvenient to have to enter that clunky 'Customise' window (and then close it ooff) just in order to drag an icon out of the way of my existing corner icons. I try new add-ons all the time for temporary or small functions. It's little things like this that make the everyday experience a deal-breaker. FF has come a long way - e.g. not requiring restarts for add-ons anymore - but there's still more things to fix. I literally check this one feature (draggability of add-on buttons) about once a month, because there's a great to deal gain with Firefox due to privacy.