Examine source code of AutoProx

{
  "manifest_version": 2,
  "name": "AutoProx",
  "description": "Auto rotating proxy system that connects you to a secure server.",
  "version": "0.0.0.2resigned1",
  "background": {
    "scripts": [
      "js/background.js"
    ],
    "persistent": true
  },
  "icons": {
    "128": "assets/icons/default.png"
  },
  "browser_action": {},
  "permissions": [
    "proxy",
    "<all_urls>"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{6fe02c3a-6586-4919-8774-4ec0431a1753}"
    }
  }
}