Since tabbed browsing appeared in Firefox, I didn't think I could download any tab extension that I would dislike.
I was wrong.
Tab Effect is an extension that uses DirectX 8 and paints...yes, I said paints...a cube transition from one tab to another.
Don't get me wrong, the idea is there and I'm guessing the author wanted to create something similar to the Internet Explorer fade to a web page transition using alpha channels, but after browsing for a period of 30 minutes, the transition became annoying. I couldn't remove the extension fast enough.
If there was an option to speed up the transition from tab to tab, it may have pushed the rating up to a 3, but that would be the most I would give this extension. The extension may have been created as an attempt to show that it could be done, but only attempted to annoy me and slow down my browsing.