GoDaddy JavaScript Injection
Igor Kromin (via Hacker News):
The technology that’s in use here is called Real User Metrics and GoDaddy has a page about it here - Why am I signed up for Real User Metrics?. If you happen to be a customer in US (which I am not but the website is hosted in a US data centre) then you are automatically opted into this service and all your website’s pages will have this JavaScript injected into them.
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The worst part of it is GoDaddy, in their help article, admits that this could slow down or break your site! So much for a tool that is designed to improve performance and reliability!
It sounds like this only happens if you use GoDaddy as a Web host, rather than just for DNS.
