The file description_page.lang (first localized version of Firefox page on Play Store) has been removed because strings are obsolete. If you need to check your old translations, you can access the files by browsing the repo before the removal or running git checkout 8402782fe9a3f67192631b460fbe545cec887e79 in command line.
This repository has been archived by the owner on Sep 24, 2019. It is now read-only.