[embedding-shape]

> even if it gets silently redirected later you will notice as the page wont be bookmarked anymore

What? Are you not talking about browser bookmarks? They don't change because the target website starts redirecting somewhere, at least not the browsers I typically use.

[akimbostrawman]

In firefox at least the bookmark star indicator disappears if you leave the site and the url does not match the orignal bookmarked anymore = phishing protection without installing more unnecessary software and increasing attack surface.