The list of most visited sites was more useful as it was dynamic and listed the most popular sites all the time automatically.The list is a duplicate of the browser's top sites.Firefox's recent address bar change is a prime example for that, and this one may be as well.
Most changes made to a browser's user interface or functionality are controversial in nature. What arguments do users make that dislike the change? by adding your favorite sites to the listing on the New Tab page, it is at its core a static list that does not change automatically. by clicking on it, you used to get the list of most visited pages displayed to you this changed with the release of Firefox 77 as Firefox displays the top sites now. Top sites are identical to the sites on the browser's New Tab page.
