Comment 2 for bug 800857

So, this dependency in the nightly builds is currently very strict, because we get issues with users upgrading firefox without upgrading language packs, in combination with running the addon compatibility reporter, and this breaks Firefox. We want to be able to prevent users upgrading one or the other in future, so I've replaced the dependency in the nightly build with a strict Breaks instead, but i'm not sure how well that will work out yet.

There is no strict relationship in the current stable version (it's just a loose dependency), so there's no need to keep that