I can't speak for Jeroen, but I played around with the upstream builds (both 92 and 91) and my faulty profile a bit and managed to isolate the trigger combination for this: `MOZ_ENABLE_WAYLAND=1` and setting `layout.css.devPixelsPerPx` to my preferred value of `1.2`; either resetting `layout.css.devPixelsPerPx` to its default (`-1.0`), or running Firefox without `MOZ_ENABLE_WAYLAND=1` will make the toolbar items work again. [Here's the graphics portion of my `about:support`](https://pastebin.mozilla.org/OdgM9Oox).
**So my steps to reproduce this are:** 1. start Firefox with `MOZ_ENABLE_WAYLAND=1` 2. set `layout.css.devPixelsPerPx` to `1.2` 3. click on the hamburger menu button **What I expect to happen:** For the hamburger menu content to show. **What happens instead:** The hamburger menu content flickers or doesn't show at all. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1940417 Title: On Wayland toolbar menus are sometimes invisible/flickering To manage notifications about this bug go to: https://bugs.launchpad.net/firefox/+bug/1940417/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
