Firefox 3.5 & 3.6



Once your browser is open, select the Tools menu and click Clear Recent History
Select a timeframe from the Time Range to Clear dropdown menu.
It is generally best to select Everything.
In the details list, make sure Cookies are selected.
If you also want to clear your cache, make sure that Cache is selected as well.
Click Clear Now.

To delete specific cookies, you will need to go to the Tools menu and click Page Info
click the Security tab.
Click View Cookies and look through the list of the sites you wish to delete the cookies for (you may have to remove the text in the Search field for this)
You can even expand each site to delete specific cookies from each site.
Click Remove Cookies.



Firefox 3.0



Once your browser is open, select the Tools menu
click Options...
select the Privacy tab.
Click the Show Cookies... button.
To delete all cookies click the Remove All Cookies button.

To delete specific cookies
Click View Cookies and look through the list of the sites you wish to delete the cookies for.
You can even expand each site to delete specific cookies from each site.
Click Remove Cookies.