GitHub Privacy redacts commit and comment creation dates on GitHub. You can choose the level of redaction: only remove minutes and seconds from the dates or even hide day or month.
Git Analytics made simple.
Arrgh Some Patchy Goodness to GitHub
Open the current page or links in Polypane, the developer tool for responsive web development and design.
Service Worker Detector
This extension detects if a website registers a Service Worker.
Toggle between development environment url's
Pin for GitHub
Pin repositories on GitHub for later without having to star them
The official Piral developer tools browser extension.