Using these scripts typically requires a Roblox script executor.

While these scripts are fun for customization, using them carries risks: What does FE stand for? - Developer Forum | Roblox

. This is a security feature that prevents scripts running on a player's computer (client) from making changes that everyone else can see (server-wide). Developer Forum | Roblox Original Intent:

Looking for a client-side script to copy or morph into other players' avatars in a server? Here’s a simple FE-compatible approach and instructions. Use at your own risk — modifying other players’ appearances without consent can violate Roblox rules and community guidelines.

: Targets a specific user to "morph" into their look.

A proper therefore relies on:

It looks like you’re referencing a script title for Roblox—likely one that copies all avatars (or character appearances) in a FE (FilteringEnabled) game.