Firefox changing default language every time it updates
I have Firefox from Ubuntu 20.04 repository and every time it updates the browser language changes from Portuguese(Portugal) to Portuguese(Brasil) and removes the option of Portuguese(Portugal) from the default list. And everytime Firefox updates I have to add Portuguese-Portugal and remove Portuguese-Brasil.
Alla svar (1)
Try the Firefox version from the official Mozilla server if you currently use a version from the repositories of your Linux distribution.