Examine source code of Lean URL

{
  "manifest_version": 2,
  "name": "Lean URL",
  "version": "0.3resigned1",
  "description": "Removes evil URL parameters such as Google Analytics' utm parameters",
  "homepage_url": "https://github.com/xmikro/lean-url",
  "icons": {
    "48": "icons/48.png",
    "96": "icons/96.png"
  },
  "permissions": [
    "webRequest",
    "webRequestBlocking"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{0bdc70c1-2257-436e-9949-aad9d0a10c12}"
    }
  }
}