Which browsers support 307/308 redirects and how do they handle them?

Question

307 & 308 redirects (https://www.rfc-editor.org/rfc/rfc7538) is accepted by most modern browsers.

However upon google-ing a lot, I am unable to find a list of browser versions that support 307/308 redirects. Many of the posts like: What's the deal with HTTP status code 308? simply ask if 308 redirects is supported or not.

I am aware that some older browsers don't support 307/308 redirects (https://developer.mozilla.org/en-US/docs/Web/HTTP/Status/308), but it's not clear which browser version doesn't.

So my question is, which browser versions support 307/308 redirects?

Also how do older browser handle this status code? Do they just fail?

Answer 1

As of 20 Feb 2018, not even all modern/supported browsers support it due to lack of support for IE 11 on Windows 7&8.1:

• Fail - IE 11 (Version 11.0.9600.18893) on Windows 7. On using a 308 in a site, the browser just appears to hang and not load anything. [Edit] As of 25 July 2018, this is still failing (Version 11.0.9600.19035) - checked just in case, you know, MS decided to do the world of devs a favour.
• Pass - IE 11 (Version 11.786.15063.0) on Windows 10
• Pass - Edge (Version 40.15063.674.0) on Windows 10
• Pass - Chrome (Versions 63.0.3239.132 and 63.0.32.132) on Windows 7 and Mac OS 11.6 respectively
• Pass - Opera (Version 50.0.2762.67) on Mac OS 11.6
• Pass - Firefox (Versions 54.0.4 and 47.0.2) on Mac OS 11.6 and Windows 7 respectively
• Pass - Safari (Version 11.0.3) on Mac OS 11.6

You can test if your browser supports 308 redirects here: http://webdbg.com/test/308/

Suggest using 301 or 307 as the current solution until IE and/or Windows 7&8.1- dies a horrible and painful death (As Microsoft are not planning on ever adding 308 support to IE on Windows 7/8.1).

[Edit 29 Jan 2020] So official support for Windows 7 ended earlier this month (on 14 Jan to be precise) and users on this platform are now being strongly encouraged to upgrade to Win10 so expect to see a precipitous drop in usage statistics.