Rooted phone needed.

Found a little tweak for mback.

Installed gravitybox for oreo in xposed.

In navigation keys actions enabled double tap action to home for all keys ( menu, home, back, recents). Will explore more which one is responsible...

Now when i double tap mback it goes to home.

Reason, sometimes its hard to press mback to go home when you are holding phone with one hand. And when surfing in browser it goes back and you lose current page...