Examine source code of Epistache

{
  "manifest_version": 2,
  "name": "Epistache",
  "description": "Récupération du token de l'intranet et de epitest pour Epistache.",
  "version": "1.1.1",
  "icons": {
    "16": "icon/16.png",
    "32": "icon/32.png",
    "48": "icon/48.png",
    "96": "icon/96.png",
    "128": "icon/128.png"
  },
  "permissions": [
    "activeTab",
    "cookies",
    "storage",
    "tabs",
    "https://intra.epitech.eu/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "Epistache",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "https://intra.epitech.eu/*",
        "https://my.epitech.eu/*"
      ],
      "js": [
        "content-scripts/content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{218c3048-d048-49c0-b1e2-b37b68e34d57}"
    }
  }
}