Examine source code of AntiFingerprint

{
  "manifest_version": 2,
  "name": "AntiFingerprint",
  "version": "0.2resigned1",
  "description": "Tries to prevent browser fingerprinting",
  "applications": {
    "gecko": {
      "id": "antifingerprint@joonatoona.me"
    }
  },
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "<all_urls>"
  ],
  "icons": {
    "48": "icon/antifingerprint-48.png"
  },
  "browser_action": {
    "default_icon": "icon/antifingerprint-48.png",
    "default_title": "AntiFingerprint",
    "default_popup": "html/popup.html"
  },
  "background": {
    "scripts": [
      "script/background.js"
    ]
  }
}