Examine source code of PopLab

{
  "name": "__MSG_appName__",
  "short_name": "PopLab",
  "description": "__MSG_appDescription__",
  "version": "3.43.0",
  "manifest_version": 3,
  "default_locale": "fr",
  "icons": {
    "48": "images/icon-48.png",
    "128": "images/icon-128.png"
  },
  "background": {
    "scripts": [
      "./scripts/background/background.js"
    ],
    "service_worker": "./scripts/background/background.js"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "scripts/polyfill/browser-polyfill.min.js",
        "scripts/polyfill/webcomponents-bundle.js",
        "scripts/polyfill/custom-elements.min.js",
        "scripts/contentscript/components/paginator/paginator.js",
        "scripts/contentscript/components/autocomplete/autocomplete.js",
        "scripts/contentscript/contentscript.js"
      ],
      "css": [
        "styles/contentscript.css",
        "styles/common.css",
        "styles/overlay.css",
        "styles/paginator.css",
        "styles/autocomplete.css"
      ]
    }
  ],
  "action": {
    "default_icon": "images/icon-48.png",
    "default_title": "__MSG_browserActionTitle__",
    "default_popup": "pages/popup.html"
  },
  "permissions": [
    "activeTab",
    "contextMenus",
    "notifications",
    "storage",
    "webNavigation",
    "tabs"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "images/*"
      ],
      "matches": [
        "<all_urls>"
      ]
    },
    {
      "resources": [
        "scripts/polyfill/browser-polyfill.min.js.map",
        "styles/fonts/*.woff",
        "styles/fonts/*.woff2"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{9d54fa7d-7068-4483-8c64-d0ec5ccbe2c4}"
    }
  }
}