Currently an unwanted search engine is displayed when I open a new tab. A previous answer to the same problem said to go to the Control Panel and uninstall the "Start Now Toolbar", but I don't see that in the "Uninstall or change a program" section of Control Panel.
Re: How do I get a blank page when opening a new tab?
Thanks, ideato! That worked great, and I didn't really even have to restart Firefox to see that it did. I just changed it as you suggested, then opened a new tab, and voila, it was blank!
For anyone else with this issue, if you use ideato's link to about:config, it takes you to a help page which says to type "about:config" into the browser's url field, which takes you to the page where this change can be made....