You could try Sleipnir
, which allows you to use both IE's Trident engine and Gecko (which is what Firefox uses), switching between them by just clicking the little icon in the statusbar.
You can choose a default engine (I would choose Gecko) and if you have any issues with a particular page, just click that icon to switch when you need it. It only switches the engine for that tab
While in Trident mode, it will use the engine of whatever version of IE you happen to have installed. (IE 5+)
The Gecko engine isn't installed by default and on some system configurations (like mine) it can be a bit tricky to install. They offer the Gecko installer separately for the portable version, but you will not be able to install it and still keep Sleipnir completely portable.
I ran into some issues because I have K-Meleon
installed on my system, too. I had to get my hands dirty, running process monitor
to find out why the install was failing, and then editing the registry to get it to work.
Be warned: tech support is offered through their forum, English is not their first language, and they assume you are an experienced knowledgeable Windows power user. They don't hold your hand and walk you through fixing issues and will only hint
at where you should look and what to do.