Just created a Chrome extension to open any magnet links directly into the Real Debrid torrent page.

Figured someone may find it useful :) https://chromewebstore.google.com/detail/Open%20magnet%20links%20in%20Real-Debrid/hllbagncpmengihmigbedbjmmjmopcom

EDIT: Firefox version has been submitted for approval. In the meanwhile, the release is available on my Github
https://github.com/f1shpie/OMLiRD-extension

EDIT 2: Firefox version has been approved! it's available here: https://addons.mozilla.org/en-GB/firefox/addon/omlird/