I use Ubuntu 10.04, and recently I’ve had some computer problems. It took me a while to find where Google Chrome installs in Linux. Chrome doesn’t install to the Users Home folder like other programs, rather it installs to “~/.config/google-chrome”.
The Chrome user data (bookmarks, history, etc.) and settings are in “~/.config/google-chrome/Default”. Back this folder up, so if something goes wrong, rename or copy the entire folder to another location, re-install chrome and then paste the backed-up folder back into same location.
Also, the file “Bookmarks” is in `json` format, so can be directly imported into other browsers too.