Until now I never had issues with Firefox.

But here in Germany the fanbase of ff ist larger. Maybe that’s why you don’t have problems with most of sites from Europe?!?

I just tested homepage but dashy looks promising. It looks like homepage lacks support for user authentication, but dashy supports it.

Thanks! I have chosen that one for my test. But it looks like there is no access/user management available.

Sounds like your nextcloud instance has a low limit for the upload file size. It has to be adjusted in the php settings of your nextcloud server. I set it to 1 GB and have no problem in uploading my videos using auto upload of the nextcloud app.

As every other nuclear power plant located at the coast does and nobody cares. AFAIK the water from Fukushima is “cleaner” than from other sites.