Examine source code of EOF Proxy Extension

{
  "manifest_version": 2,
  "name": "EOF Proxy Extension",
  "description": "Simple proxy management EOF extension for Firefox",
  "version": "3.4.0",
  "browser_specific_settings": {
    "gecko": {
      "strict_min_version": "91.1.0",
      "id": "{7dce52c7-8288-4fa8-b645-a39b053052f4}"
    }
  },
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    }
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "permissions": [
    "storage",
    "proxy",
    "webRequest",
    "webRequestBlocking",
    "<all_urls>",
    "tabs",
    "activeTab",
    "privacy",
    "notifications"
  ]
}