Can you Alt+Tab between them? 'Cos if you can, that's exactly what I want FF to do... and until it can, I'm sticking with FF3.6.

Yes I can alt+tab between them. But I don't want new windows!...and that's not really an answer. Anyway, I've solved it...just added it to compatability mode for XP...now works as expected i.e. ONE window, and as many tabs as I want to have open.

I'm assuming you are referring to Tab Previews in the Win7 Taskbar. This can be turned of rather easily.

• Open a New Tab
  • Type about:config in the address bar

When the page loads click "I'll be careful, I Promise"

In the "Filter" bar at the top of the page type

• browser.taskbar.previews.enable
  • Double click it to set the Value to FALSE

If you simply type "Taskbar" in the filter, this will give you ever option that pertains to the windows 7 taskbar.

Running FF in Compatibility Mode is not advised.

Why not compatibility mode...seems to work fine

Running in compatibility mode is your choice, the instructions I post above will allow you to run FF9 normally while removing the Tab previews.

And Before you switched to "Compatibility Mode" you still only had "One Window" - The taskbar FF icon was just display previews of each Tab, not creating multiple Windows.

OK...I've now installed version 10 of FF, which did the same thing. I've followed your instructions and made the change in about:config...all fine now... thank you.

You are welcome. Please be sure to mark your question as Solved if your question was answered.