are use to store bits of information on your computer. This can be useful. For example, when you visit bleepingcomputer.com and log in, BC stores a cookie on your computer with information that this person is logged in. Next time you visit BC, you wont have to login. Nice Tracking cookies
are basically from adversting web sites like doubleclick-dot-com. They are used to track your web surfing behavior and accordingly display ads on websites you visit. For example, if you visit a lingerie web site on which doubleclick-dot-com displays ads, it would store a cookie on your computer. Next, you visit another fashion website where again doubleclick-dot-com displays ads, it would store this information in cookie. So now, they know what types of web sites you visit, and would display you ads of clothings lingeries etc. They track
you for months and even years if you dont delete them.
What you can do against tracking cookies?
1. Open Firefox > Tools > Options > Privacy
. In the Firefox will
combobox, select Use custom settings for history
. In the settings displayed, un-check option for Accept third-party cookies
. Some web sites may complain about this.
2. You may install firefox addon AdBlock
. It would block most of the ad-servers altogether. https://addons.mozilla.org/en-US/firefox/addon/1865