Examine source code of CamTuner

{
  "name": "CamTuner",
  "version": "1.4.2",
  "manifest_version": 2,
  "description": "Customize your webcam configuration.",
  "background": {
    "scripts": [
      "src/extension/background.js"
    ]
  },
  "browser_action": {
    "default_popup": "src/pages/popup/index.html"
  },
  "options_page": "src/pages/options/index.html",
  "permissions": [
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "src/extension/content.js"
      ],
      "run_at": "document_start",
      "all_frames": true
    }
  ],
  "web_accessible_resources": [
    "src/extension/*"
  ],
  "applications": {
    "gecko": {
      "id": "camtuner@tonmoydeb.com"
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  }
}