Examine source code of Clear Cache Nowsv

{
  "manifest_version": 2,
  "name": "Clear Cache Now",
  "version": "1.0",
  "description": "Quickly clear cache, cookies, and other browsing data.",
  "permissions": [
    "browsingData"
  ],
  "browser_action": {
    "default_title": "Clear Cache",
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icon.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{e8b2f020-38a8-4bfe-b0e5-0fbc4da90545}"
    }
  }
}