Hi Mike Miller, If you're unable to resize the browser window width on Ubuntu 24.04.2, here are a few things to check: * Is the window maximized? Try clicking the maximize/restore button or dragging the title bar to restore windowed mode. * Wayland vs X11: Firefox may behave differently under Wayland. Try launching Firefox with the MOZ_ENABLE_WAYLAND=0 environment variable to force X11: MOZ_ENABLE_WAYLAND=0 firefox * Snap version of Firefox: If you're using the Snap version, resizing issues have been reported in some cases. You might want to try installing the .deb version via Mozilla’s site or Flatpak as a test. Let me know if the issue persists or if you're using a tiling window manager — happy to dig deeper! — Nathan