Examine source code of ALERTE REDUC +

{
  "name": "ALERTE REDUC +",
  "version": "1.0.3",
  "description": "Grâce à notre extension vous êtes alerté(e) instantanément des offres de remboursement (cashback) chez vos marchands préférés et vous faites de bonnes affaires !",
  "homepage_url": "https://reducplus.co/",
  "manifest_version": 2,
  "author": "REDUCPLUS",
  "permissions": [
    "tabs",
    "webRequest",
    "storage",
    "<all_urls>",
    "cookies",
    "unlimitedStorage",
    "alarms",
    "*://*/*"
  ],
  "background": {
    "scripts": [
      "vendors/bundle.js",
      "bg/bundle.js"
    ],
    "persistent": true
  },
  "content_scripts": [
    {
      "all_frames": false,
      "js": [
        "vendors/bundle.js",
        "content/bundle.js"
      ],
      "matches": [
        "<all_urls>"
      ],
      "run_at": "document_end"
    }
  ],
  "browser_action": {
    "default_icon": "48x48.png",
    "default_title": "ALERTE REDUC +"
  },
  "icons": {
    "48": "48x48.png"
  },
  "web_accessible_resources": [
    "content/*.css",
    "content/*.svg",
    "icon-24.png",
    "*.css"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{0e068919-e312-44a2-b5c6-5bb753f6d8f3}"
    }
  }
}