Examine source code of Classic Netscape Throbber

{
  "manifest_version": 2,
  "name": "Classic Netscape Throbber",
  "description": "Show the Netscape Navigator or Internet Explorer loading animation in Firefox",
  "version": "1.3.0",
  "icons": {
    "16": "logo/logo16.png",
    "48": "logo/logo48.png",
    "128": "logo/logo128.png"
  },
  "browser_action": {
    "default_icon": "logo/logo16.png"
  },
  "background": {
    "scripts": [
      "script.js"
    ],
    "persistent": false
  },
  "options_ui": {
    "page": "options/options.html",
    "open_in_tab": false
  },
  "permissions": [
    "activeTab",
    "storage",
    "tabs"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{89772a9a-380f-49b2-bb48-582796985bbe}",
      "strict_min_version": "79.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}