Examine source code of GitHub Hide Notifications

{
  "name": "GitHub Hide Notifications",
  "version": "0.1",
  "manifest_version": 2,
  "description": "A browser extension that lets you hide some of your notifications ",
  "homepage_url": "https://github.com/janpio/github-hide-notifications",
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "permissions": [
    "tabs",
    "https://github.com/*",
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://github.com/notifications*",
        "https://github.com/*/notifications",
        "https://github.com/notifications?all=*"
      ],
      "js": [
        "src/inject/inject.js"
      ],
      "run_at": "document_start"
    }
  ],
  "options_ui": {
    "page": "settings/options.html"
  },
  "applications": {
    "gecko": {
      "id": "github-hide-notifications@janpiotrowski.de"
    }
  }
}