Examine source code of Image Format Saver

{
  "manifest_version": 2,
  "name": "__MSG_extensionName__",
  "description": "__MSG_extensionDescription__",
  "version": "0.1.0",
  "default_locale": "en",
  "permissions": [
    "contextMenus",
    "downloads",
    "storage",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "shared/browser-api.js",
      "shared/settings.js",
      "shared/naming.js",
      "shared/converter.js",
      "background-firefox.js"
    ]
  },
  "options_ui": {
    "page": "options.html",
    "browser_style": true
  },
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "image-format-saver@example.com",
      "strict_min_version": "115.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}