Description of problem: When I switch away from Firefox to another app by Alt+Tab and then I want to scroll a displayed page without switching back, just hover on Firefox window, it does not scroll but goes in page history back and forth as if I was still holding Alt key. Version-Release number of selected component (if applicable): firefox.x86_64 69.0.1-3.fc31 How reproducible: 100% Steps to Reproduce: 1. Start Firefox while another non-fullscreen app running 2. Create some browsing history 3. Switch to the other window using Alt+Tab keys 4. Hover on Firefox window without switching there and use mouse wheel to scroll Actual results: Firefox going in browsing history back and forth Expected results: The page should scroll without any url changes Additional info: Running a wayland session, I haven't observed such behaviour in any other app (e.g. Chromium works fine), so I expect it is a Firefox problem.
That's bug 1650051. *** This bug has been marked as a duplicate of bug 1650051 ***