I have used
NetShredX for years to automatically (and manually) "shred" Web browser temporary caches and history, along with trashed e-mail messages. It works with all Web browsers and e-mail programs.
From Mireth's Web site: "NetShredX will erase (not just delete) browser cache, history, download cache, Quicktime cache, favicons, email cache, email, junk and spam so the data can't be recovered." Deleted/trashed files can be easily recovered...
It is also available in an OS 9 flavor. Both versions work flawlessly and are highly recommended.
I don't know the Google URL, but you can check out
Metaspy. There are "censored" and "uncensored" versions.
And while you can delete your Internet tracks on your computer, Google keeps a record of all Google searches along with the IP address of the computer where the search request originated. Originally Google kept these records forever, but I think that the company announced at some point that the records would be kept for "only" 18 months. Google has never been able to offer a satisfactory explanation for why the company needs to store that kind of data, and its existence is quite worrisome to privacy advocates. If a person wants to maintain their privacy when using Google they need to use a VPN server so the originating IP address isn't captured by Google.