The official Piral developer tools browser extension.
Service Worker Detector
This extension detects if a website registers a Service Worker.
Shows notifications about various events in TeamCity
Arrgh Some Patchy Goodness to GitHub
GitHub (Enterprise) Projects Plus
[Deprecated] Adds advanced labels management and other functionality to GitHub.
Git Analytics made simple.
Novibyte Issues Plugin
Jira Issues Management
NsLookup - Find DNS Records
A simple and powerful tool for querying DNS records