Examine source code of Tabrador

{
  "manifest_version": 2,
  "name": "Tabrador",
  "version": "1.2resigned1",
  "description": "Open multiple links at once into background tabs. Woof.",
  "icons": {
    "48": "icons/icon-48.png"
  },
  "background": {
    "scripts": [
      "src/background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "libs/jquery-3.3.1.slim.min.js",
        "src/tabrador.js"
      ],
      "css": [
        "src/tabrador.css"
      ],
      "run_at": "document_end"
    }
  ],
  "permissions": [
    "tabs"
  ],
  "applications": {
    "gecko": {
      "id": "tabrador@sebcharrot.com"
    }
  },
  "web_accessible_resources": [
    "icons/icon-48.png"
  ]
}