Remove Most Visited Pages Online

If you want to keep the section but remove a single, embarrassing URL:

Result: That site vanishes. Unlike Chrome, Firefox will not automatically replace it until you visit many new sites. remove most visited pages

You cannot fully remove the "Frequently Visited" section from the start page on iOS without turning off everything else. If you want to keep the section but

Firefox doesn’t have a built-in “Most Visited” section on new tabs by default – it shows “Top Sites” instead. To clear/remove those: Result: That site vanishes

Apple’s Safari is notoriously stubborn about customization. It assumes you want the Apple way. Removing "Most Visited" (called "Frequently Visited") is possible, but Apple hides the switch.

Safari handles this through its main Preferences menu rather than the new tab page itself.

To disable Frequently Visited sites: