Firefox 76.0.1 on Mac OS X 10.15.4. Simply put, I have the 'Restore previous session' checkbox ticked under Preferences -> General -> Startup, but each time I close and start Firefox, I get a new window. I checked 'browser.startup.page' property in about:config. It is in bold and set to 3. I also verified that it is set to 3 in prefs.json in my profile directory. This is really hampering my workflow. EDIT: This post can be deleted. Apparently I'm new to Mac and did not know that clicking the red button will not quit the application. I hate it already.