Excellent Rated 5 out of 5 stars
It is a great add-on and saves me a lot of time by not having to start IE for websited that are only IE compatible.
However, ever since I installed the latest version 1.5.20090525 I am having a couple of issues with it.
1. Sometimes, the IE Tab does not work i.e. it kind of hangs when trying to open a site that is configured to open in IE only. Plus, when I try to start IE by itself, even IE refuses to load my home page. The status line says "Connecting to site 207.46....." and just sits there for a long time. I don't even get the Page can not be displayed message. I have to restart Firefox for both IE Tab and IE itself to start working again. May be the developers can have a look at this issue whatever may be causing this behaviour.
2. Some CRA (Canada Revenue Agency) online services do not work properly with IE Tab. I have open Internet Explorer to do my tasks for those sites. I am referring to "My Business Account" online services for this purpose.
Other than it is a great add-on and I will always keep it no matter its quirks.