I thought about it at some point, but I also thought that people would like to have the "go to top" button always accessible in the middle of the screen so took the idea off.
But yes it seems reasonable to also scroll to the bottom of the page if someone wants to directly access the footer or something.

I will surely implement this in the second version asap.
Will it be okay if the "go to bottom" takes about 20-25% of the bar from the right? (just like your idea of right side) please let me know.

Thank you for your constructive feedback. :)


Edit:
I have updated the extension to scroll to the bottom as well.