New thread for this issue referenced in this one: https://www.displayfusion.com/Discussions/View/beta4-moving-maximized-window-by-dragging-stopped-working/?ID=0ce947ac-37fe-4338-9af6-609a401f4e49#31

Unfortunately, I can't make a video of the issue because it's very sporadic, I can't even reproduce it willingly, and so far I was unable to figure out what triggers it.

The problem: Firefox moves to next monitor as if I was middle-clicking the titlebar even though I was trying to open a link somewhere inside the window by middle-clicking on it.

I don't want to enable logging for a long time - sometimes even days pass by without encountering it - so right now I'm looking for ideas about what could cause this or suggestions as to how to reproduce it.

Sounds great, thanks!
No specific websites that I can think of, doesn't even have to be any website, happens also when middle-clicking on a tab to close it or somewhere else inside the window.

This also started happning to me since the latest 10.1 update. Window moves sporatically to the next monitor when middle-clicking tabs in Firefox

This is occuring with me as well with the 10.1.1 upgrade. Running Firefox 117.0.1 (64-bit) official release.