I think there is a shareware program out there that deletes Google cookies, but its free for only 30 days.
Anyone have a free one or one an addon to Firefox??
just tell firefox that google is forbidden to set cookies. you don”t need an add on. now one good add-on, in case you don’t have it is: NoScript. Granular control of javascript on web pages. You can forbid google-analytics but allow the main site script to run.