Hello Joe122, This has been a bug for quite some time now, and is still being worked on. See : https://bugzilla.mozilla.org/show_bug.cgi?id=1458034 As a workaround for now, would you do this please : Type in the address bar '''about:config''' and press Enter (promise to be careful, if asked) Type in the search bar : '''browser.tabs.remote.autostart''' and '''browser.tabs.remote.autostart2''' Set their values to '''false''' Then close and restart Firefox. 'Hope that will make a difference ......