You mentioned two reasons for moving to Firefox..

Firstly, the toolbars. Did you know that Google have developed a brilliant addin for IE (only), called the Google Toolbar. Firstly, it blocks popups and secondly it integrates perfectly with the search engine. When you type in search terms into the toolbar and press enter, the search will be run and the search terms will become buttons on the Google Toolbar. You just have to click on them to find where they occur within the page. Plus, the toolbar has a form auto-filler and displays the Google page-rank of the current page.

As for tabbed browsing, I have used this in Mozilla and Opera, comparing it to running several IE instances, listed on a vertically-docked start-bar. I prefer IE’s “tabbed browsing” experience. For me it works just as well, and you can potentially arrange several browsers on one screen. Also, the browser is well supported by the OS, it loads in a jiffy. I don’t find that the taskbar gets cluttered.

As for sites using web standards and being displayed correctly, what about all the sites that were coded for IE? I have a hunch there are more sites out there that render “as the designer intended” when browsing with Internet Explorer