Default [Q] FB,Gmail, other system apps to internal memory

I rooted my Xperia E C1504 ( single ). No flashing ROM. Nothing. Just rooted. I could move some of the non-movable apps to internal memory after rooting. But there are still apps like Facebook, Gmail, Browser, that are considered as system apps and unable to move to internal memory.
I use Titanium Backup.
And if I could move these apps, I think I can hibernate them in Greenify.
I searched for modules in Xposed Framework too. No use there.

Someone help please ?