FireFox language switches to English after update

[Arrababiski]

@michaldybczak

Yeah, I noticed that the language doesn’t change with every single update.
How do you do downgrades? Usually, when I do it and open FF, it flashes a warning that the current profile is adjusted to a different FF version and is not compatible with the current one, so it can’t be opened.

DOWNGRADE_FROM_ALA=1 sudo downgrade firefox firefox-i18n-es-es to downgrade firefox and then restore compatibility.ini file of previous version from backup. This file contains the last version installed. If you don’t have a backup, 127.0.1 file contains these five lines:

[Compatibility]
LastVersion=127.0.1_20240618215959/20240618215959
LastOSABI=Linux_x86_64-gcc3
LastPlatformDir=/usr/lib/firefox
LastAppDir=/usr/lib/firefox/browser

EDIT: today Firefox was updated from 128.0.1 to 128.0.2 and kept spanish language. Let’s see what happens with 129.0.

EDIT AGAIN: I’ve just updated to 129.0 and still kept spanish language. Good news.