10 features for a perfect browser   There are some  great  browsers  out there. But they all seem to have some slight niggles, different for  each, that make it hard for me to kick back and enjoy them.        While there are some projects out there to make browsers more useful for  some specialised purposes  or by bolting on handy  extensions, wouldn't it be great if these people could come up with a  standardised set of nice features like these? A lot of browsers may support  one or two, but I'll bet none have them all.  