Examine source code of LegalViz.EU

{
  "manifest_version": 3,
  "name": "LegalViz.EU",
  "version": "2.1.0",
  "description": "Read EU law beautifully, and with ease",
  "browser_specific_settings": {
    "gecko": {
      "id": "eur-lex-visualiser@maastrichtlawtech.github.io",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "activeTab"
  ],
  "action": {
    "default_title": "Open in LegalViz.EU",
    "default_icon": {
      "16": "icon16.png",
      "48": "icon48.png",
      "128": "icon128.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "service_worker": "background.js"
  },
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  }
}