Firefox add-on BetterPrivacy can get rid of privacy-busting
Flash cookies, also known as local shared objects or LSOs, which
are used by many sites to supplement the normal HTTP cookies. Flash
cookies can be used for similar things as HTTP cookies, including
saving preferences and tracking where you surf, but you can’t
delete Flash cookies using basic browser options like you can with
Even if you’re already cookie-savvy, BetterPrivacy can add a
level of security in an area you might not have considered. One study
found that some advertisers use the persistent Flash cookies to
re-create deleted HTTP cookies. So you might think you’re
protecting your privacy by regularly deleting cookies, but sneaky
sites can use the information in Flash cookies to put the deleted
HTTP cookies right back in place.
The straightforward BetterPrivacy add-on automatically
determines where the LSOs exist on your hard drive, and can be set
to automatically delete them when the browser starts or exits, or
after a certain amount of time. By default the add-on will display
a small confirmation pop-up when you close the browser before it
If you’re concerned about maintaining your privacy online and
you use Firefox, then you’ll want BetterPrivacy.
Note: This link takes you to the Mozilla.org
add-on site, where you can automatically install Better Privacy
into your Firefox browser.