Firefox "failed to read config file"

[WinstonSmith]

Firefox-esr after update Failed to read config file

I can’t remember if PureOS for Librem 5 has the mobile-config automatically installed, but it was installed on mine. Removing it made the warning go away. To do that you can run sudo apt remove firefox-esr-mobile-config Make sure that all the dashes are in there, because if you use a space in there at the wrong spot then you might tell it to remove Firefox instead.