Examine source code of SOCKS5 Proxy Changer

{
  "manifest_version": 2,
  "name": "Proxy Changer",
  "description": "Rotate between Mullvad proxy servers to combat blocking.",
  "version": "1.6",
  "icons": {
    "48": "images/icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "proxychanger@vladimir.sharpie",
      "strict_min_version": "91.1.0"
    }
  },
  "browser_action": {
    "default_popup": "popup.html"
  },
  "permissions": [
    "proxy",
    "storage"
  ]
}