A YouTube video in Firefox 40.0.3 can no longer be maximized to full screen. It immediately reverts back to it's windowed state.

Not related to Firefox from what I can tell, as I've been running this version of FF for almost a month now. No changes have been made to it.

Update: Only way to get this to work again was to maximize FF to all three monitors, then hit the Fullscreen YT button.

Thanks for the reply Jon - it was Beta 3 that caused the problem. It has been the bane of my existence this week since I installed it, and has more bugs than I can count easily.

- Can't maximize YouTube vids
- Start menu won't open on a monitor other than where I put the Windows primary Taskbar
- DF taskbars won't hide when using an app setup in the Compatibility area
- Can't drag Firefox (any possibly other apps) to a virtual split monitor space (via the Monitor Profiles splits area)

There are others, can't think what they were at the moment. I'd *really* like to rollback to Beta 2 if possible. If not, I might have to opt-out of the Beta, it just isn't usable on W10.

Keith,

I have changed monitor configuration and uninstalled Display Fusion until it is solid with Windows 10. Needed to get work done, not mess with bugs.

Perhaps if someone else is experiencing it they might be able to troubleshoot.