When using Firefox, sometimes my C-c is automatically disabled and does nothing after that (copying with right click -> copy still works, so does clicking with the middle mouse button). Restarting Firefox does not help.

Sometimes I also have a curious bug, that the window sometimes "flickers", shows the desktop wallpaper for a fragment of a second, than brings the window back to focus. I wonder if these weird effects are due to using the Gnome desktop, and my guess that it has something to do with the top-bar interfering with FF. Any idea how to fix this?

  • There are several "clipboards" in Linux. Sometimes an application loses the connection with one of them. If you have a clipboard manager/history keeper, it will usually see both clipboards and will copy data between them (to the benefit of applications that only access one). But no, I don't know why FF ceases to talk to the clipboard.
    – xenoid
    Jun 21 '17 at 9:28

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