What are some alternatives?
When comparing Adblock Fast and StopAd PRO, you can also consider the following products
Adblock Plus - AdBlock Plus is a browser extension for Firefox, Chrome, Opera, and several other popular browsers that prevents intrusive ads like pop-ups and malicious code from appearing on websites you visit.
Crystal - Crystal shows you the best way to communicate with any prospect, customer, or coworker based on their unique personality.
Ghostery - Privacy tool for transparency and control
BlockBear - Block ads and protect your privacy on iOS with a bear
Brave - Fast and secure, ad and tracker blocking browser.
Facebook Clear History - Delete data that Facebook has collected on you