Github Pull Filter for Chrome
More About Github Pull Filter
Sometimes you commit library files, or re-format a bunch of files. This is highly annoying for someone reviewing it because they can't collapse groups of files via a filter. If they have this extension installed, they can use it to auto-collapse and code review the files you want them to.
For more information, or reporting issues, visit the github page: https://github.com/arianitu/github-pull-filter
Sept 11, 2017: Fixed for latest GitHub.