Examine source code of GitHub Notifier

{
  "manifest_version" : 2 ,
  "name" : "GitHub Notifier",
  "description" : "Get your notifications from GitHub",
  "version" : "1.3.4",
  "developer": {
    "name" : "Angel Fernando Quiroz Campos",
    "url": "https://angelfqc.online"
  },
  "icons" : {
    "48" : "icons/github.svg"
  },
  "background" : {
    "scripts" : [
      "background.js" 
    ]
  },
  "browser_action" : {
    "default_icon" : "icons/github.svg",
    "theme_icons": [
      {
        "light": "icons/github_light.svg",
        "dark": "icons/github.svg",
        "size": 16
      },
      {
        "light": "icons/github_light.svg",
        "dark": "icons/github.svg",
        "size": 32
      }
    ]
  },
  "permissions" : [
    "*://api.github.com/notifications" ,
    "tabs" ,
    "storage" ,
    "notifications" 
  ],
  "options_ui" : {
    "page": "options/page.html" 
  },
  "applications": {
    "gecko": {
      "id": "{0906178a-2043-4d0c-a099-bd6a4d00945e}"
    }
  }
}