The essence is infinite redrawing of the web view. After hiding the tabbar the issue disappears (toggle fullscreen or activate tab panel extension).
Disabling the KatzeThrobber doesn't make a difference.
Disabling notebook label resizing has literally no effect in GTK+3.
Disabling tab label ellipsizing misteriously disables resizing of tabs.
The essence is infinite redrawing of the web view. After hiding the tabbar the issue disappears (toggle fullscreen or activate tab panel extension).
Disabling the KatzeThrobber doesn't make a difference.
Disabling notebook label resizing has literally no effect in GTK+3.
Disabling tab label ellipsizing misteriously disables resizing of tabs.