Some major upgrades have arrived for Proton Drive and Docs.

https://news.itsfoss.com/proton-drive-docs-update/

Proton Brings Updates to Its Drive App and Docs, but Keeps Linux Users Waiting

Proton has updated its Drive app and Docs, but Linux users are still waiting for a native Drive app.

It's FOSS News

@itsfoss Linux support has been promised for so many years now, I no longer believe that anything will come of it. And what is available as a Linux version is ultimately half-heartedly implemented crap.

If they took security seriously, there would be a corresponding repository with the source code. And a corresponding community would have formed long ago. But then you could possibly find out that Proton's promises regarding security are not quite so secure after all.