Indicate PR status with colored favicons
More often than not, pull requests opened on Github have external services analyzing the code - making sure the tests pass, that style guides are enforced, and other goodies like that.
Now, you can see at a glance the status of each pull request. The favicon of each tab will change colors to indicate whether CI is passing on the pull request.
Source code available at:
https://github.com/graysonwright/better-github-favicons