Examine source code of CORSE

{
  "name": "CORSE",
  "version": "1.1",
  "description": "CORS Everywhere allows to anonymously fetch resources across origin",
  "author": "Roman Shafigullin",
  "background": {
    "scripts": [
      "cors-background.js"
    ],
    "persistent": true
  },
  "permissions": [
    "<all_urls>",
    "webRequest",
    "webRequestBlocking"
  ],
  "icons": {
    "128": "icon128.png"
  },
  "manifest_version": 2
}