Hi, I have been using firefox for a long time and have been quite happy with it, but not so long ago (I suspect that it started happening after the update from 14.3.) I have begun experiencing a really annoying bug/feature and have not been able to fix it myself. The Bug: When watching any video on any site with fullscreen on, after going to desktop and back (with the three finger down gesture on the touchpad and then three fingers back up) to check the time, the video playing suddenly minimizes (goes out of fullscreen mode) and the whole site goes into fullscreen mode, just as if I have pressed f11 which i didn't a aslo dont want, i know that it seems as a minor issue but it is extremely frustrating as I have been using this for a long time now, and i cant just check time like this anymore. What have I tried: I have tried doing this in incognito, disabling all addons, messing with settings, trying troubleshooting mode, logging out, and doing the same thing in chrome which doesn't do it. If anyone has any advice, i would be very grateful, thanks.