New tabs on right side & Metacritic search engine Bewertet mit 5 von 5 Sternen

I thought the new tabs usually opened on right side in earlier versions (didn't they?) and then recently it changed, thats why I was confused.

About MC: its listed 8 times in my search engines, screenshot oi58.tinypic.com/314c9ad.jpg
After I delete it, it appears again after I close and open the search engines window one more time.

Dieser Benutzer hat 2 ältere Bewertungen zu diesem Add-on.

I'll provide an option to open tab on right again, despite that I'm convinced that opening on left is better.

I don't know how that 8-time MC issue showed up. I might need you to email me to reproduce error or test fix. Pls email using the addon page's "Support E-mail" link.