Examine source code of CoordCloak

{
  "manifest_version": 2,
  "name": "CoordCloak",
  "version": "1.3.1",
  "description": "Spoof your browser geolocation with custom coordinates",
  "author": "CoordCloak",
  "icons": {
    "48": "icons/icon48.png",
    "96": "icons/icon96.png"
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icons/icon48.png"
    },
    "default_title": "CoordCloak"
  },
  "content_security_policy": "script-src 'self'; connect-src https://nominatim.openstreetmap.org https://server.arcgisonline.com; img-src 'self' https://server.arcgisonline.com data: blob:; object-src 'self'",
  "permissions": [
    "storage",
    "tabs",
    "<all_urls>"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_start",
      "all_frames": true
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "coordcloak@qtchi.github.io",
      "strict_min_version": "63.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}