Examine source code of Moqups Extension

{
  "manifest_version": 3,
  "name": "Moqups",
  "description": "Convert webpages and designs into fully editable layouts, grab screenshots and use them in Moqups",
  "version": "2.0.3",
  "icons": {
    "16": "images/m16.png",
    "32": "images/m32.png",
    "48": "images/m48.png",
    "128": "images/m128.png"
  },
  "permissions": [
    "storage",
    "activeTab",
    "scripting"
  ],
  "host_permissions": [
    "https://api.moqups.com/*",
    "https://app.moqups.com/*"
  ],
  "optional_permissions": [
    "webNavigation"
  ],
  "optional_host_permissions": [
    "*://*/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{d56c6b4a-bcf4-4122-8d6b-936e16af4c15}",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "https://app.moqups.com/*"
      ],
      "css": [
        "content-scripts/colorpicker.css"
      ],
      "js": [
        "content-scripts/colorpicker.js",
        "content-scripts/use-result-in-app.js"
      ]
    }
  ]
}