Oh ok, thanks :) Then everything works as expected on the FF side and you are running into a bad compositor bug. Do you by chance run KWinFT? I thought the regular KWin doesn't have `wp_viewporter`. Closing this bug as we don't need to track compositor bugs for settings that are not enabled by default. We'll need careful checking before enabling by default this feature any way. Please open an issue for the compositor you are using and link it here.
Bug 1711266 Comment 6 Edit History
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Oh ok, thanks :) Then everything works as expected on the FF side and you are running into a bad compositor bug. Do you by chance run KWinFT? I thought the regular KWin doesn't have `wp_viewporter`. Closing this bug as we don't need to track compositor bugs for settings that are not enabled by default. We'll need careful checking before enabling this feature by default any way. Please open an issue for the compositor you are using and link it here.