Examine source code of Multigest

{
  "manifest_version": 2,
  "name": "Multigest",
  "version": "1.2.0",
  "description": "Connecteur universel Multigest. La GED, partout.",
  "homepage_url": "https://www.multigest.fr/",
  "icons": {
    "48": "icons/icon48.png",
    "96": "icons/icon96.png"
  },
  "permissions": [
    "activeTab",
    "alarms",
    "browsingData",
    "notifications",
    "cookies",
    "tabs",
    "sessions",
    "storage",
    "webRequest",
    "webNavigation",
    "clipboardWrite",
    "clipboardRead",
    "contextMenus"
  ],
  "browser_action": {
    "default_icon": "icons/icon32gray.png",
    "default_title": "Multigest",
    "default_popup": "popup/index.html"
  },
  "background": {
    "scripts": [
      "browser-polyfill.js",
      "background.js"
    ],
    "persistent": true
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "browser-polyfill.js",
        "content.js"
      ],
      "css": [
        "content.css"
      ]
    }
  ],
  "web_accessible_resources": [
    "images/error.svg"
  ]
}