Examine source code of darwin-webextension

{
  "description": "Permet une gestion multi-ecrans et multi-fenetres",
  "manifest_version": 2,
  "name": "darwin-webextension-window-open",
  "version": "1.1.12",
  "homepage_url": "http://gitlab-prod.maif.local/SWAP/darwin-webextension-window-open",
  "icons": {
    "128": "icons/darwin-dog-128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_start"
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "notifications",
    "tabs",
    "<all_urls>"
  ]
}