Helper for GitHub notifications in Gmail

Helper for GitHub notifications in Gmail
A browser extension for Chrome, Firefox(broken), and Safari that adds keyboard shortcuts to the Gmail interface for GitHub notification emails.
Mail View Shortcut
Open your GitHub notifications in mail view:

Chrome/Firefox: shift + g, shift + b in the background
Safari: ctrl + g, ctrl + b in the background
Mail view button

List View Shortcut
ctrl + return to trigger one the action button when an email is selected using gmail key navigation (when the blue bar appears):

action button in list view

Mute Thread
Mute thread in mail view. It will open a background window to load the mute thread URL, and close itself when done. This only works if you have an active GitHub session.

Chrome/Firefox: shift + h
Safari: ctrl + h
Mute thread button

Installation
The easy way
Chrome: Install the extension via Chrome webstore
Firefox: Install the addon via Firefox addons gallery
Safari: N/A I have not signed up for Apple Developer Program

Settings
Custom domains
Mail view: open thread shortcut
Mail view: open thread in background shortcut
Mail view: mute thread shortcut
Custom Domains (for GitHub Enterprise)
If you are using GitHub Enterprise and have a custom domain, you can set it in the extension options page.