I'm experiencing a weird issue where, every time I move my mouse between different monitors and click the left button, it also seems to press the Alt key at the same time. This became obvious when I tried to alt-tab to another monitor while gaming, and my Firefox started acting up. I checked with a keyboard tester and it confirmed that the Alt key lights up whenever I left-click after switching monitors, even with my keyboard unplugged. Interestingly, this problem doesn't occur when I'm using Chrome, which makes me think it's not a hardware or driver issue with my mouse or keyboard, but possibly something related to Firefox instead.
4 Answers
yeah, i got the same problem, i thought im the only lucky one. any luck solving?
I think it's discord? If I close discord entirely it stops happening. Let me know if it's doing the same for y'all
It sounds like a browser-related issue. For me, this was happening only in Chrome and not in Edge. Do you have any extensions that might be interfering?
I’ve had this issue too, and it started just recently for me as well. I’m not sure what software might be causing it, though. Have you made any changes to your setup?
Same here! I haven't changed any settings either; it just started happening out of the blue.

This is happening to me with Chrome too, so it might not just be Firefox!