Javascript fails to load from particular domains in OS X Snow Leopard on all browsers-Collection of common programming errors

The error appears universal for Chrome, Firefox, Safari, etc. I have repaired permissions, cleaned any caches I could find and so forth but the problem remains.

The problem appears also with externally loaded jQuery (for instance), returning in the case of jQuery the following errors:

$ is not defined (Firefox)

or

Uncaught ReferenceError: $ is not defined (Chrome)

Examples for websites that fail to load/run JS: reddit, omegle, www.translation-telephone.com.

What are some things I should try?

Originally posted 2013-11-23 09:50:51.