Examine source code of AmIUnique

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "AmIUnique",
  "version": "1.0.9",
  "version_name": "1.0.9",
  "author": "Pierre Laperdrix",
  "description": "__MSG_description__",
  "homepage_url": "https://amiunique.org/",
  "offline_enabled": false,
  "default_locale": "en",
  "permissions": [
    "https://amiunique.org/*",
    "storage"
  ],
  "background": {
    "page": "background.html"
  },
  "content_scripts": [
    {
      "matches": [
        "https://amiunique.org/*"
      ],
      "js": [
        "content.js"
      ],
      "all_frames": true,
      "run_at": "document_end"
    }
  ],
  "icons": {
    "16": "icon-16.png",
    "48": "icon-48.png",
    "128": "icon.png"
  },
  "browser_action": {
    "default_icon": "icon-16.png",
    "default_popup": "popup.html"
  },
  "options_ui": {
    "page": "options.html",
    "chrome_style": true
  },
  "content_security_policy": "script-src 'self'; object-src 'self'"
}