@saomoon I had this problem, even though now not anymore. I don't know if you still have it or if this is going to work but I think it is the sidebar colour which shows on every video in full screen. I don't think it is a bug or a glitch, if you want to remove it I think you can hide the sidebar for the time you are watching the video and show it back when you are finished. To hide it by using a keyboard shortcut, you should go to settings and search "shortcuts". Then find "Enable advanced keyboard shortcuts" and turn it on. Then, under, click on "Configure shortcuts" and find "Show sidebar". Here you can configure what keyboard shortcut you prefer!

@guywiththebestusername: Anyway it is still very good looking! Cool!

Can you not put it in the extension line at the top?

@leocg ???

@leocg Yes (to right-click and click the "close tab" button). (By the way, I am on computer) Only when I click the x on the tab it does not work.

@leocg Yes. (By the way I am on computer) Only when I click the x on the tab it does not work.

@saomoon I had this problem, even though now not anymore. I don't know if you still have it or if this is going to work but I think it is the sidebar colour which shows on every video in full screen. I don't think it is a bug or a glitch, if you want to remove it I think you can hide the sidebar for the time you are watching the video and show it back when you are finished. To hide it by using a keyboard shortcut, you should go to settings and search "shortcuts". Then find "Enable advanced keyboard shortcuts" and turn it on. Then, under, click on "Configure shortcuts" and find "Show sidebar". Here you can configure what keyboard shortcut you prefer!

When I click the "x" to close any tab (except speed dial) it does not work and I have to click it again to close the tab finally. I followed leocg's advice and I removed the ad blocker, and now it works fine. The problem is I like the ad blocker a lot and I am not happy to browse without it so please fix this problem Opera GX.