Hi, I hope Google translate, did its job and I got your question right, but please remember this is an "English speaking" forum.
In answer to your question, I have seen this before, but only when using the modified version of FF6, however, still worth doing even on the none modded.
Enable DEVELOPER OPTIONS on your Android phone and see if this helps.
If you dont know how to enable developer options, rather than me explain here, its as easy to point you to THIS SITE
