Focus stealing in opera

Does anyone know how to prevent websites from stealing focus in opera? It is getting on my nerves lately

I simply leave Javascript disabled and enable it when I need it (have added the toggle to the UI). Makes page loading noticeably faster too. Alternatively you could disable it and then enable it for some specific sites with site specific prefs.

Anyway, I think this might be what you're looking for: tools > preferences > advanced > content > javascript options > allow raising of windows.

Or open the following link:
opera:config#Allow%20script%20to%20raise%20window