Examine source code of GitHub Open Notifications

{
  "name" : "GitHub Open Notifications",
  "version" : "1.2resigned1",
  "manifest_version" : 2 ,
  "description" : "Extension that provides buttons on the GitHub notifications page to open them (all|all PRs|all closed|all with user...) in new tabs",
  "homepage_url" : "https://github.com/janpio/github-open-notifications-extension",
  "icons" : {
    "16" : "icons/icon16.png",
    "48" : "icons/icon48.png",
    "128" : "icons/icon128.png"
  },
  "permissions" : [
    "tabs" ,
    "https://github.com/*" 
  ],
  "content_scripts" : [
    {
      "matches" : [
        "https://github.com/notifications*" ,
        "https://github.com/*/notifications" ,
        "https://github.com/notifications?all=*" 
      ],
      "js" : [
        "lib/d3.v4.min.js" ,
        "src/inject/inject.js" 
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{23200428-ac5f-47b2-808b-8f272a075210}"
    }
  }
}