Examine source code of Proxy Cat

{
  "manifest_version": 2,
  "name": "Proxy Cat",
  "version": "0.2.0",
  "description": "Assign proxies per site, tab, or tab group.",
  "author": "Sudhir Babu Nakka",
  "homepage_url": "https://github.com/sudhir-asuracore/firefox-proxy-cat",
  "permissions": [
    "proxy",
    "tabs",
    "contextMenus",
    "storage",
    "<all_urls>"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "support-proxycat@sudhirnakka.com",
      "strict_min_version": "91.1.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "background": {
    "scripts": [
      "storage.js",
      "matcher.js",
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "Proxy Cat",
    "default_popup": "popup/popup.html",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "64": "icons/icon-64.png"
    }
  },
  "options_ui": {
    "page": "options/options.html",
    "open_in_tab": true
  },
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "64": "icons/icon-64.png",
    "128": "icons/icon-128.png"
  }
}