Examine source code of Loadster Recorder

{
  "manifest_version": 2,
  "icons": {
    "16": "icon-16x16.png",
    "32": "icon-32x32.png",
    "48": "icon-48x48.png",
    "128": "icon-128x128.png",
    "256": "icon-256x256.png"
  },
  "browser_action": {
    "default_icon": "icon-32x32.png",
    "default_popup": "src/index.html"
  },
  "background": {
    "scripts": [
      "src/background/background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://localhost/*",
        "https://loadster.com/*",
        "https://loadster.app/*",
        "https://*.loadster.com/*",
        "https://*.loadster.app/*"
      ],
      "js": [
        "src/content/loadsterBridge.js"
      ],
      "run_at": "document_start"
    }
  ],
  "permissions": [
    "webRequest",
    "webNavigation",
    "*://*/*"
  ],
  "version": "29.0.0",
  "name": "Loadster Recorder Extension",
  "description": "Create test scripts to run in Loadster.",
  "browser_specific_settings": {
    "gecko": {
      "id": "{f03c369b-ec55-4eac-97cd-79f775e60320}"
    }
  }
}