I’ve just spent 2 hours digging in and here is the easiest way I can explain them to anyone.
I will be back soon to elaborate and provide you with examples.
Once the reCAPTCHA is loading on the page, it will be loading its contents in an IFRAME. This is really important to our story!
There are links in the Google CAPTCHA that point to a privacy page and terms of service page on the Google.com domain which both have a “target =_blank” attribute on the link. This means these links should open in new windows or tab depending on other pressed keys.
The links are working just fine in Chrome and Firefox and opening in new windows but not IE 11.
What is the issue here?
It could have been earlier than IE 11 but, Microsoft implemented a security feature to restrict links loading in IFRAMES from linking out to a domain other than the one it originally loaded from.
The CAPTCHA code is loading from your WhatEverDomain.com but all the links in the IFRAME are pointing to the Google.com domain are now all disabled.