about:config
Snippet: How to Disable Firefox 4 Tab Preview in Windows 7
We all know that Firefox 4 comes with plenty of interesting and useful features. However, there is one feature that really annoy me out of hell – the tab preview feature (only available for Windows 7).
Here’s what happen: Let’s assume that your Firefox browser is opened with plenty of tabs, but it is not currently your active application (you might be doing some work in Ms. Office). When you hover your mouse above the Firefox icon in the taskbar, it will show a preview of all the opened tabs. This is good and fine as I can now pick the tab that I want to go to. The bad part is, I don’t want to manually select the tab everytime. When I click on the Firefox icon, I would expect it to switch to the browser immediately and load my last active tab, not to make me select the tab.
/>
id="more-20681">
/> 

