Options to add a Back(<), Forward(>), Add(☆) and show menu(=) button (Android)

[Mutzu]

When I'm surfing and researching on my phone, I often use the back and forward buttons in other browsers because it's very fast.
It would be very practical if you could optionally display a Back(<), Forth(>), Add(☆) and show menu(=) button at the bottom center of the screen. (Only the buttons you need.)
Because that's where my finger is when I scroll down and decide whether I want to go back.

For me it's a question of efficency where my finger is and how many buttons I have to click.
At the moment I have to move to the upper right, click on menu and then click on the back button.

(It's a bit distracting for me that the menu bar appears, when I'm scrolling up. That's why I'm also suggesting an optionally menu(=) button a the bottom center.)