Examine source code of Proxy Auth

{
  "manifest_version": 2,
  "name": "Proxy Auth",
  "description": "",
  "version": "1.0",
  "background": {
    "scripts": [
      "lib.js",
      "bg.js"
    ]
  },
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "<all_urls>"
  ],
  "browser_action": {
    "default_title": "Proxy Auth"
  },
  "options_page": "options.html",
  "browser_specific_settings": {
    "gecko": {
      "id": "{ca11da0f-60e7-40c4-a7a5-cff7c4f0fe85}"
    }
  }
}