Examine source code of smart proxy switcher

{
  "manifest_version": 2,
  "name": "proxy switcher",
  "version": "1.3",
  "description": "Apply proxy on blocked requess only",
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "permissions": [
    "tabs",
    "activeTab",
    "webNavigation",
    "storage",
    "webRequest",
    "webRequestBlocking",
    "proxy",
    "<all_urls>"
  ],
  "incognito": "spanning",
  "options_page": "options.html",
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "32": "icons/icon32.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "js": [
        "content.js"
      ],
      "matches": [
        "<all_urls>"
      ],
      "run_at": "document_end"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "627fbecc74a745ea958018bda8fd913b@devslab.in",
      "strict_min_version": "126.0"
    }
  }
}