It would be great to have Web apps that can accept `acct` URLs as input and show you the information about that Fediverse account. So if you link to someone with their Webfinger handle, clicking it would take you to your Mastodon client or a dedicated app just for reviewing these accounts.
There's a cool feature called `registerProtocolHandler` in Web browsers that makes this possible.
https://developer.mozilla.org/en-US/docs/Web/API/Navigator/registerProtocolHandler