message: fix(devtools): setting default page for extension
diff: "16": "favicon.ico"
  },
  "browser_action": {
  - "default_popup": "popups/disabled.html"
  + "default_popup": "popups/not-angular.html"
  },
  "devtools_page": "devtools.html",
  "web_accessible_resources": ["backend.js", "runtime.js", "devtools.html"],
  