Restores browser behavior of navigating to previous page when pressing the Backspace key.This extension requires permissions to inject a piece of code in all of the pages you visit. If that freaks you out, that's ok. Handing over those permissions freaks me out too.
You can choose to install this extension from source (it's very short) to make sure it's not doing anything malicious.
See: https://github.com/oslego/chrome-backspace-back#from-source