32 bit or 64 bit ? what types of sites you talking here facebook, youtube or average news site ?
for me 10.60 to 10.64 is the best version Opera released yet, 11.64 is like 10.60 with memory leaks fixed.
I could do typical benchmark and 10.60 will have allmost same performance to 11.64, except memory leaks in 10.60 .
12 is alright but that pluginwarapper is not good for people with single core cpu. It is shame that both browser and pluginwrapper eat cpu.
I do agree probably keep 11.64 in my old pc.
I do not understand noscript part, I normally have enable plug-ins on demand ticked in Opera , isn’t noscript doing the same ? it do inscrese performance in my old pc so I do not understand why did you sound like noscript making browser slow ? I do not use ff so may be it is different.