The feature that Liftoff has is automatic redirects. So for example if I am lemmy.one user and want to subscribe to !memes@lemmy.ml, clicking the Subscribe button on the Liftoff app will offer to redirect me to lemmy.one/c/memes@lemmy.ml. On the web interface, you will have to manually go to that domain.
With the normal web interface it’s easy as well
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The feature that Liftoff has is automatic redirects. So for example if I am lemmy.one user and want to subscribe to !memes@lemmy.ml, clicking the Subscribe button on the Liftoff app will offer to redirect me to lemmy.one/c/memes@lemmy.ml. On the web interface, you will have to manually go to that domain.