It's actually not querying anything, since it works for any query you pass. What happens is that you're bypassing cache because you're loading a different page,

It's actually not querying anything, since it works for any query you pass. What happens is that you're bypassing cache because you're loading a different page, as explained by sirn above. https://www.google.com/favicon.ico?anyquery https://www.google.com/favicon.ico?anyquery