Examine source code of Github Relations

{
  "manifest_version" : 2 ,
  "name" : "Github Relations",
  "version" : "2.0.0",
  "description" : "Show related branches at top issues, and related issues at top of PR's.",
  "icons" : {
    "48" : "logo-48.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "github-related-branches@noitidart.com"
    }
  },
  "content_scripts" : [
    {
      "matches" : [
        "*://github.com/*/*/issues/*" 
      ],
      "js" : [
        "related-branches.js" 
      ]
    },
    {
      "matches" : [
        "*://github.com/*/*/pull/*" 
      ],
      "js" : [
        "related-issues.js" 
      ]
    }
  ],
  "options_ui" : {
    "page": "options.html" ,
    "browser_style": true
  },
  "permissions" : [
    "storage" ,
    "https://api.github.com/*" 
  ]
}