I have modified wikipedia pages, then googled it, to see search result &quot;instantly&quot; updated.<p>Also, sneaky web sites often give different results to the googlebot user agent than to a non-google firefox user agent<p><a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;User_agent" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;User_agent</a><p><a href="https:&#x2F;&#x2F;addons.mozilla.org&#x2F;en-GB&#x2F;firefox&#x2F;search&#x2F;?q=user+agent&amp;cat=all" rel="nofollow">https:&#x2F;&#x2F;addons.mozilla.org&#x2F;en-GB&#x2F;firefox&#x2F;search&#x2F;?q=user+agen...</a>