Do you think it is possible to customize the main bar buttons or add missing actions to a submenu that substitutes the back arrow? In that way the left finger would manage reload, new tab..ecc..

Out of curiosity:
I have always wondered if instead double click to zoom the full web page just to click on the proper page number of a thread... it would be possible to manage a "one click and half action" to zoom just a zone of a web page using some kind of lense effect with a crossair to pick the right link..
Probably the development effort would be much more than the advantages, but i have always asked myself why no one is using such kind of trick into mobile devices.