When you browse online, advertisers track you to serve targeted ads. I know you've had ads follow you from site to site before - I once had an especially persistent iPad case ad follow me around for two weeks.
Turning on your browser's "Do Not Track" settings should take care of some of it. However, there are plenty of advertisers that don't accept it. Plus, hackers like to follow you around with malicious cookies as well.
That doesn't mean you're helpless, though.
Use Privacy Badger to sniff out and block those spying ads and invisible trackers. This powerful browser add-on will keep your Web surfing safe and tracker-free.
Privacy Badger detects the third party domain scripts, images, and ads embedded in the sites that you visit. If there's a tracker or cookie that seems to be following you around, Privacy Badger will stop your browser from loading items from that source. To the advertiser or hacker, it will look like you've disappeared.
The best part is that you don't have to do a thing; Privacy Badger will perform these tasks automatically.
To see what Privacy Badger is blocking, click on the icon that appears in your address bar in Chrome or in your toolbar in Firefox. Privacy Badger will display a list of cookies and tracking programs on the site.
When the slider button is green, it means that the program is harmless. Yellow means that the program is on a Whitelist, and red means that the program has been blocked completely.
However, if you want more security, you can also manage your privacy directly through the browser extension by adjusting the slider bars on each tracker.