Blocking External JavaScript and CSS The person asking the question has a valid reason to be concerned about how Google might react about blocking external resources. The question: “If you use ...

When using external JavaScript files as part of the page, some SEOs and site owners use their robots.txt file to block Google from accessing that code, unaware of the consequence.

Researcher shows how Instagram and Facebook’s use of an in-app browser within both its iOS apps can track interactions with external websites.