Examine source code of Site Cache Buster

{
  "manifest_version": 3,
  "name": "Site Cache Buster",
  "version": "1.0.0",
  "description": "Click the toolbar icon to instantly clear the cache for the current site and hard-reload it. No more '?nocache=1234' hacks.",
  "permissions": [
    "browsingData",
    "tabs",
    "activeTab",
    "storage",
    "notifications"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "core.js",
      "background.js"
    ]
  },
  "action": {
    "default_title": "Clear cache for this site & reload",
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "32": "icons/icon32.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "commands": {
    "clear-current-site-cache": {
      "suggested_key": {
        "default": "Ctrl+Shift+9"
      },
      "description": "Run the preferred cache action on the current site"
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "site-cache-buster@example.local",
      "strict_min_version": "115.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}