Hi, I browse exclusively full-screen, and I've had a recurring headache making the annoying full-screen animation go away since the inception of Firefox itself- it is the best browser by far and I am loathe to use anything else. This question comes up time and time again, disabling animations through about:config is very much hit and miss and seems to work completely randomly, sometimes it does, sometimes it don't. Well, now it don't. Again. I have the following set: full-screen-api.transition-duration.enter: 0 0 full-screen-api.transition-duration.leave: 0 0 full-screen-api.transition.timeout: 0 0 full-screen-api.warning.delay: 0 full-screen-api.warning.timeout: 0 dom.animations-api.core.enabled: false Oddly enough, there used to be options for setting "cosmetic" animations too, but I have no option to change that since FF 100. Can someone please let me know how to solve this because the annoyance is big enough for me to switch over to Opera or some other browser permanently for how consistently unreliable this function is. Thank you.