Delete your track

DELETE GOOGLE SEARCH HISTORY
You can easily delete your Google search history. You can do this via the following link: http://support.google.com/websearch/bin/answer.py?hl=da&answer=465

Internet Explorer
Delete all history

Press the ctrl, shift and del buttons at the same time.
Check the items you want to delete - if you only want to delete the immediate traces of the pages you have visited and not the settings and autologins, check the overview and uncheck the others
Press delete

Firefox

Delete a single website

Press the ctrl and h buttons at the same time.
Press the time frame that matches the time you visited the site
Find the site you want to remove, press the right mouse button and select "delete this site"
Delete all history:

Press ctrl, shift and del at the same time
Press the arrow for details
Check the items you want to delete - if you only want to delete the visibility of the pages you have visited and not the settings and autologins, check the overview and uncheck the others
Choose how far back you want to delete the history
Press "clear now"
Chrome

Delete a single website:

Press the wrench to the right of the address field
Select history
Press "edit items"
Check the visited pages you want to remove from history
Press "remove selected items"
Delete all history:

Press the wrench
Select tools
Press "clear browsing data"
Check the items you want to delete - if you only want to delete the visibility of the pages you have visited and not the settings and autologins, check the overview and remove the others
Select how long ago you want to delete the history
Press "clear browsing data"
Source: http://www.bredbaandsmatch.dk/internetbrug/browserhistorik/
Surf the web without leaving a trace

With private browsing you can do things without it being logged on your computer and without your cookies having an influence on what you do.

This can be an advantage, for example, if you want to be reasonably sure that a computer does not store information about your codes, or if you visit sites that you do not want other users of the computer to know about.

This way you can have privacy. However, your internet service provider can still see which sites you visit, and a network administrator may have programs that monitor what you do and thus also intercept what you do in anonymous browsing.

In Firefox and Internet Explorer, you can access private browsing by pressing ctrl+shift+p

In Google Chrome, Opera, you can access the function by pressing ctrl+shift+n

This will open a window where you can browse without saving log files - the next time you open the browser, you will be back in normal mode, and the windows you already have open will continue to save cookies and the like as normal.

Source: http://www.bredbaandsmatch.dk/internetbrug/browserhistorik/anonym/