MyZen Tab is a browser extension that was created to monetize user activity. It does not provide any significant benefits and instead changes the main settings, like the homepage, new tab address, and search engine. It can also increase the amount of commercial content, and start displaying pop-ups, banners, and cause redirects.
The extension is promoted as a useful tool that can help users regain focus. In reality, the developers of this web-based app do not care about user privacy, security or let alone any benefits. They may use rogue advertising networks that place ads leading to dangerous pages.