Here is the description how to do it: https://medium.com/@Aenon/firefox-hide-native-tabs-and-titlebar-f0b00bdbb88b https://medium.com/@Aenon/firefox-hide-native

Here is the description how to do it: https://medium.com/@Aenon/firefox-hide-native-tabs-and-titlebar-f0b00bdbb88b https://medium.com/@Aenon/firefox-hide-native-tabs-and-title...