What should I block?

There’s no right or wrong answer here. What you block depends on what your personal browsing needs are. Different trackers can impact your browsing experience in different ways:

• Under-performing trackers or too many trackers on a page can cause the page to load slowly.
• Too many advertising or pop-up trackers can clutter your page with ads and make it hard to see the page's real content.
• When a HTTP tracker appears on an HTTPS page it can cause the page to be unsecure, exposing your personal data to a possible vulnerability.