Welcome to BC !
Third Party cookies which are ad and tracking cookies can be blocked from installing on your browsers. Otherwise those cookies will get installed
when you visit almost all popular sites and most other sites.
How To Disable Third-Party Cookies In All Major Browsers
Once you have blocked the third party cookies from installing, you will need to remove the ones presently installed in your browsers.
You can do that using CCleaner.
Use CCleaner to remove Temporary files, program caches, cookies, logs, etc. Use the Default settings. No need to use the
Registry Cleaning Tool...risky. Pay close attention while installing and UNcheck offers of toolbars....especially Google.
After install, open CCleaner and run by clicking on the Run Cleaner button in the bottom right corner.
CCleaner - PC Optimization and Cleaning - Free Download