If you figure out what site is giving you cookies that you don't like, you could go there in a "private browsing" session instead - e.g. http://www.lifehack....ruly-private.html

I typically have a main FF or Chrome window with a few dozen tabs, then a second "private browsing" window that I use for sites that are paywalled after a few visits (e.g. the NY Times or the Economist). Since they can't leave cookies there, the most they can do is make me restart the window.

On the memory and CPU issues with Safari, there doesn't seem to be a universal solution. Some swear the issue is interaction of adblockers with Safari - http://forums.macrum...ead.php?t=1419010 - other say it has to do with Java (not Javascript). Some swear it has to do with memory leaks with common plugins. Dunno. The web is so complicated these days that you may have little choice but to use multiple browsers that are configured differently. I wouldn't think that the memory and CPU issues have anything to do with cookies, so there's that...

Good luck.

Cheers,
Scott.