I'm not sure what you mean by lag, chrome has preloading, possibly that's what you're seeing (negative lag?). I use Ubuntu 12.04 and don't see any "lag". FF is

I'm not sure what you mean by lag, chrome has preloading, possibly that's what you're seeing (negative lag?). I use Ubuntu 12.04 and don't see any "lag". FF is snappy. I use chrome most, but mainly because I prefer it's developer tools and memory footprint, but neither of them are very economical with memory.