{
  "manifest_version": 2,
  "name": "Tab counter",
  "version": "0.9.0",
  "browser_action": { "default_popup": "popup.html" },
  "background": { "scripts": ["background.js"], "persistent": false },
  "permissions": ["storage", "tabs", "webRequest", "webRequestBlocking", "<all_urls>"]
}