Examine source code of Proxy Switcher

{
  "manifest_version": 2,
  "name": "Proxy Switcher",
  "version": "1.0.0",
  "description": "Selectively apply proxy servers to specific domains. All settings are stored locally and no data is collected or transmitted externally.",
  "icons": {
    "16": "icons/16_16.png",
    "32": "icons/32_32.png",
    "48": "icons/48_48.png",
    "64": "icons/64_64.png",
    "96": "icons/96_96.png",
    "128": "icons/128_128.png",
    "512": "icons/512_512.png"
  },
  "permissions": [
    "proxy",
    "storage",
    "tabs",
    "activeTab",
    "webRequest",
    "webRequestBlocking",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "config-manager.js",
      "background.js"
    ],
    "persistent": true
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icons/16_16.png"
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "proxy-switcher@1a2b3c4f",
      "strict_min_version": "91.1.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}