I'm on Win11. The recent releases of FF seem to have disabled my ability (while in FF) to bring my mouse to the lower area of my screen to have the Win11 lower task bar appear. In order to get here, I have to shrink FF via it's upper right hand shrink button, then in the Win11 home screen bring my mouse pointer down to the lower screen area to popup that task bar. Gemini suggests there's a compatibility setting related to issues with high res screens that FF has... but I can't find this switch/setting... maybe Gemini is hallucinating about this. (Curiously, Gemini insists that this is not a FF issue... despite the fact that it's the only app on my PC having this issue).