Examine source code of Simple Cache Cleaner

{
  "manifest_version": 2,
  "name": "Simple Cache Cleaner",
  "version": "1.0",
  "description": "Quickly clear your browser's cache with a single click.",
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "permissions": [
    "browsingData"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{c2c17849-e12c-46b1-8dc2-90f37d0c7a45}"
    }
  }
}