I've been researching this all day long (today and yesterday). I did it! I did install Chrome and the same persists. This isn't a problem on firefox actually, it's in the system! All images have that problem here. I don't know exactly who's blame, but my guesses are KDE or this Open Source Driver. So yesterday I tried to change to nonfree graphics, the result? That initial screen "initializing 232" or something like that, the system was stuck on that. So I tried that thing of chroot, I did reinstall the free driver, but the same persisted, then I go to reinstall Manjaro fully, I choose nonfree graphics, and now when I type mhwd -li:
Installed PCI configs:
NAME VERSION FREEDRIVER TYPE
video-hybrid-intel-ati-bumblebee 2016.01.28 true PCI
Warning: No installed USB configs!
And the free graphics still here! There's one more thing: I can't see things clearly here, contrast is too low (everything is too bright) - I've already tried changing gamma and brightness.
Oh, and I have a R7 M260 hybrid with a HD5500.
The problem just can be this computer! Everyone only says wonderful things about Linux, and so far all I got are problems. But I'm not blaming Manjaro, I got a lot ot problems with Ubuntu too.