Privacy Browser Android

Using Privacy Browser as my default browser, I just wanted to activate a mastodon account in tusky (Android mastodon client app). Signup will work like this:

(1) redirect to a given mastodon instance for web login and access granting
(2) redirect, the browser to an url like oauth2redirect://com.keylesspalace.tusky/?code=<.....>

The second step should launch / switch to the correct app (tusky, in this case) to complete registration. However, so far Privacy Browser, while hitting the oauth2redirect:// url, stops with an error complaining about an unknown URL scheme. Would it be possible to support this kind of login procedures? It would be great not to have to have a second browser around just for such purposes. ;)