Examine source code of Clear Cookies & Cache

{
  "manifest_version": 2,
  "name": "Clear Cookies & Cache",
  "version": "1.0",
  "description": "Clear browser cookies and cache with one click.",
  "permissions": [
    "browsingData",
    "tabs"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icon.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "128": "icon.png"
  },
  "applications": {
    "gecko": {
      "id": "ariannasmith2372@gmail.com",
      "strict_min_version": "68.0"
    }
  }
}