[luistricks]

This is a good answer that works in reddit, but if you change the user agent, it will work in almost any website with support for ie.

IE6 User Agent:

Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)

https://addons.mozilla.org/es/firefox/addon/uaswitcher/

This can be done with Selenium too.

https://stackoverflow.com/questions/29916054/change-user-age...

[css]

You can set a custom UA in Firefox without an extension by going to about:config and adding the new UA as a string called `general.useragent.override`.

[luistricks]

Yes you can, but with the addon it is easier, and you can set your custom user agents and store within, it is just for comfort.