[derleth]

It would be interesting to know how those pages function in IE5. Does anything they do rely on JS IE5 doesn't understand? CSS IE5 can't process? eBay, Amazon, and Facebook especially might become worthless even though it looks like they render in a usable fashion.

[bicknergseng]

IE5 had XHR, but didn't have native JSON support and a number of other features. I think it was on ECMA 1 or 2 until IE5.5, which had 3.

I wager no one uses JSON shims anymore. I don't really know what would happen when you try to use JSON in ECMA 1 or 2.

[yuhong]

Native JSON support was only added in IE8.

[robin_reala]

Anyone that uses jQuery’s (<=1.9) JSON functionality is using a JSON shim:

https://github.com/jquery/jquery/blob/1.9-stable/src/core.js...

[ultimoo]

Although I am not certain about it, the way browsers are expected to handle encryption may have also changed in 14 years -- making payment gateways on these websites wither unusable or risky.