I’m having this very strange issue, where a small green dot shows up in the tab bar of Firefox. Opening a new tab makes it go away, and closing Firefox also makes it go away. I tried taking a screenshot, but it didn’t show up. It only being visible when Firefox is open makes me think it isn’t a dead or stuck pixel. I’ve had the same issue on Firefox and Wayland, and through two fresh installs. Also, just got my laptop about a week ago.
If you are referring to a dot like in my screenshot, the explanation is simple. The dot shows up every time, when more than one instance of an app is running. In this case I reproduced it with a normal Firefox session and an additional instance with a private/incognito tab.
Opening two instances of dolphin for example will also add that green dot.
If that would be it, it would show up in a screenshot as well. But that is not the case.
So the best bet is a hardware issue with the monitor.
@lumbo7332
Is the green dot always in the same location? What happens if you resize the Firefox window and move it around? Is the green dot moving as well?
It stays in the same spot, but if I move the Firefox window a bit over to the right, it disappears. Moving it back over to the left makes it appear again.
If I have a theme with white titlebars (e.g. Breeze Light), I can’t see it. Funnily enough, normal Breeze (with grey titlebars) was making it show up in system settings, but Dracula doesn’t. This is just bizarre.