My issue is that when I have Firefox minimised on my left monitor and I use the jump list option "Move Window To Next Monitor" Firefox ends up on my right monitor but shrunk to a tiny little box (see attached picture). If I have Firefox not minimised then it moves fine and doesn't change size. It doesn't seem to affect any other programs in this way either. Anything that can be done about this?

Windows 7 64bit
Firefox 45.0.1
Two monitors with start menu on right monitor.
DisplayFusion 7.3.4 Steam Version

Hi, i'm not at the pc where it goes to a different screen but I get it opening up on the same monitor like you but in the 'tiny' window on this computer as well. It has a slightly different setup but very similar.

Windows 7 64bit
2 monitors, start menu on left screen.
Firefox 44.0.1
DisplayFusion Steam 7.3.4

I've attached the debug info from this pc for now. It happens around 21:16:30. If you still want the other computers debug info I can get it but won't be at that computer till tomorrow (it is at my office currently on home pc).

Here is the log from my office computer where it moves to another screen and Firefox opens up as a tiny window. Log collected around 08:33:45

I have the same issue with Firefox / Displayfusion. Same symptoms.