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}"
    }
  }
}