This is a developer tool for demonstrating did:fedi, and is not meant to be an example of user-facing options in an implementation intended for end users (as instead, it's the responsibility of the developer to make the preferential selections for the user).
Note that key operations are performed with the Noble (v1.6.0) JavaScript library, which may be prone to side-channel attacks, due to the non-deterministic performance of JavaScript itself, whereas constant-time execution is virtually impossible to enforce in JavaScript code.