Gog games are also digitally signed. So you can check the signer and know it hasn’t been tampered with.

They actually did somewhat start Edge from scratch originally. They made EdgeHTML as a rewrite of the IE 11 trident engine.

In the end they abandoned it and moved over to chromium. One of the reasons being Google intentionally breaking their sites for EdgeHTML.

There’s an official Jellyfin app in the LG app store.