Examine source code of GitLab Notify

{
  "manifest_version": 2,
  "version": "2.2.0",
  "name": "GitLab Notify",
  "short_name": "GitLab Notify",
  "description": "Don't miss any GitLab merge requests or issues and rocket up your productivity.",
  "icons": {
    "48": "icon48.cda4501f.png",
    "96": "icon96.afedefe9.png",
    "128": "icon128.f4b2d122.png"
  },
  "background": {
    "scripts": [
      "background.5428fd25.js"
    ]
  },
  "browser_action": {
    "default_popup": "popup.b343871f.html"
  },
  "options_ui": {
    "page": "options.0381ca82.html"
  },
  "web_accessible_resources": [],
  "permissions": [
    "storage",
    "alarms"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{dfc14507-bc0e-4d1b-899e-ba09a445acab}"
    }
  }
}