Examine source code of Recherche rapide

{
  "description": "Effectuer des recherche sur de nombreux moteurs de recherches facilement",
  "manifest_version": 2,
  "name": "Recherche rapide",
  "version": "1.0",
  "icons": {
    "48": "assets/icon-48.png",
    "300": "assets/icon-300.png"
  },
  "permissions": [
    "webRequest",
    "contextMenus",
    "webRequestBlocking",
    "<all_urls>",
    "menus",
    "activeTab"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  }
}