Examine source code of CRC Helper

{
  "manifest_version": 2,
  "name": "CRC Helper",
  "version": "3.2.2",
  "description": "Crowdsourced Report Tool",
  "permissions": [
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "crc@kuru.sh"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://connect.cloudresearch.com/participant/*"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "styles.css"
      ]
    }
  ],
  "browser_action": {
    "default_popup": "popup.html"
  },
  "web_accessible_resources": [
    "admin.html",
    "admin.js",
    "styles.css"
  ],
  "content_security_policy": "script-src 'self'; object-src 'self'; style-src 'self' https://fonts.googleapis.com; font-src https://fonts.gstatic.com"
}