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I use Firefox 82.0.3 and I don't want to use Chrome. This problem only occurs on Firefox. This problem doesn't occur on Chrome at all. The problem is that when sharing the screen in a Google Meeting, Firefox only shares the mouse cursor if I share my monitor screen that I have to the left of my head. Sharing the mouse cursor in meetings is quite fundamental to have the audience focus on the specific part of the screen the presenter is talking about, much like a laser pointer. I know that Google slides have a laser pointer, but I'm not talking about sharing presentations, but contents of the screens. My screen setup is: Laptop's screen External monitor 1 plugged into laptop's HDMI cable (it's a DVI to HDMI cable) External monitor 2 plugged into DVI port on port replicator which is plugged to my laptop's USB port. The physical set up is: [2][3] [1] This is also how it's shown on my Windows' Display Settings. Where: [1] laptop screen [3] monitor connected to port replicator as main monitor [2] monitor to my left, I have to look left to see it. [1] and [2] are aligned with my head. Monitor screen [2] extends to the right into monitor screen [3] which extends downwards into laptop screen [1]. I entered a Google hangout meeting from my laptop and from my phone. I then shared the screens from my laptop so that I could see the laptop shared screen on my phone. I shared each of the 3 screens on by 1, and only the monitor to my left shares the mouse pointer. I then shared a window and if I move the window to the screen to the left, it'll share the mouse. But if I move it to the screen in front of my head, the mouse isn't shared, unless I move the cursor all the way to the right until it disappears on from the screen, and that's when it appears on my phone, but on the extreme left side, not right side. Sort of similar behaviour happens when I share a non-maximised window from my left monitor. Over the shared window on my left monitor, if I place the mouse on the last 30% right part of the window, on my phone the mouse appears displaced further to the left, like on the first 20% of the shared window. It's like the mouse pointer were in a displaced layer that when shared, gets moved to the left on the receiver of the shared screen. If I maximise the shared window, this problem goes away. I swapped the 2 external monitor cables and the problem persisted, somehow with only the monitor to the left [in spite of the cable swapping] sharing the mouse cursor. On Windows' Display Settings, I then stopped the screen extension and just used the laptop one. In this scenario, the mouse pointer over the laptop screen was shared. On Windows' Display Settings, I made each of the 3 monitors "Make this my main display" and this still didn't make a difference. Only the monitor to the left continued to share the mouse pointer. I then disconnected both external monitors and shared my laptop's screen, then the mouse cursor was being shared to my phone. So going by trial and error, for me it seems like it's a bug in the way Firefox inherits display settings from Windows 10. None of these problems happen on Chrome but I just don't want to use Chrome. I also just tried Zoom and I shared my main monitor via a Zoom meeting where I also joined from my phone, and the mouse cursor was shared. So it's really a problem between Firefox and Google Meet. Makes me wonder if Google does this intentionally to make Chrome more attractive, as the new blur background feature and background replacement by a photo are also unavailable on Firefox, which seems intentional to me.