Examine source code of leboncoin light

{
  "description": "leboncoin light",
  "manifest_version": 2,
  "name": "leboncoin light",
  "version": "0.0.0",
  "icons": {
    "180": "data/icon.png"
  },
  "permissions": [
    "*://*.leboncoin.fr/*",
    "webRequest",
    "webRequestBlocking"
  ],
  "background": {
    "scripts": [
      "js/bg.js"
    ]
  },
  "applications": {
    "gecko": {
      "id": "leboncoinlight@example.com"
    }
  }
}