The Firefox .desktop file is not translatable in Launchpad.
You will need to add the translation to the file itself. I'll add a Firefox task for that in case you want to provide that translation. For an example of a similar bug for Thunderbird, here is how Spanish translations were added on bug 543590
The Firefox .desktop file is not translatable in Launchpad.
You will need to add the translation to the file itself. I'll add a Firefox task for that in case you want to provide that translation. For an example of a similar bug for Thunderbird, here is how Spanish translations were added on bug 543590