Edit: Oops – there’s actually a much simpler way. Right click on the tab area > Customize > Enable thumbnails in tabs

The Opera 10 beta has introduced a new tab feature that lets you resize tabs and expand them to show a full thumbnail. You can either click and drag it down, or middle click on it to expand the thumbnails.

While it’s an attractive feature and some people might find it useful, I’m not one of them. Since I use the middle mouse button click to open and close tabs, it actually gets in the way. I’ve been accidentally middle clicking a bit to low and opening the tab view quite often.

Follow these settings

Luckily, there’s an easy way to disable it. Just type “opera:config” into the address bar. Then type Tab into the search box. You should see “Use Thumbnails Inside Tabs” – untick this, click save, then restart Opera. Fixed.