How do you ask for the in-browser link? I managed to join a few times via the browser but as of late, i always get redirected to the app and never see the 'in browser' option anymore.

You have to pretend using the app (you get a download popup for a broken link with whatever non-existent protocol) and only after that, on the same page, appears a link that says something like "app doesn't work? try to join from your browser".

Or at least that's how it worked last time I tried a month ago or so.

Thanks, that's how i got it working too but that stopped working for me about 2 weeks ago :/