Examine source code of FlashRead

{
  "manifest_version": 3,
  "name": "FlashRead",
  "version": "1.2.2",
  "description": "RSVP-Schnellleser: zeigt den Haupttext jeder Seite und PDF-Dateien Wort fuer Wort an einer festen Blickachse an.",
  "permissions": [
    "activeTab",
    "contextMenus",
    "storage",
    "scripting"
  ],
  "optional_host_permissions": [
    "*://*/*"
  ],
  "action": {
    "default_title": "Mit FlashRead lesen (Alt+R)",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    }
  },
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "background": {
    "service_worker": "background.js",
    "scripts": [
      "background.js"
    ]
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "commands": {
    "flashread-start": {
      "suggested_key": {
        "default": "Alt+R"
      },
      "description": "FlashRead auf der aktuellen Seite starten"
    }
  },
  "web_accessible_resources": [
    {
      "resources": [
        "reader.css"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "flashread@subsample.github.io",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  }
}