I tested it and it's not that reliable. At least for me it didn't let me see events in the future (next 1,2,3 months) and I wasn't able to modify an existing event, so I gave up. I also don't have the time right now to open issues in their repo.
Yes.. and where are those? I know of agendav and infcloud, both of which are not that good: agendav is not currenly maintained and infcloud is a mess to set up.
I don't know about freshrss - I've used it a few years ago - but miniflux (another self hosted RSS reader) has integrations with a lot of tools, some of which are bookmark managers. I've set up mine with Linkding and it woks just as you described.
I can tell you something: I'm using some free apps on my Android phone and never notice ads at home, but when I'm on the mobile network or on a different wifi (at work or some public place) I start seeing them.
ZFS comes from a plugin in OMV. You have to install omv-extras first, then install the plugin omvextras-zfs. Make sure you also install the proxmox kernel and reboot the server before installing zfs.
Hm.. you made me check and indeed it needs connection, but I was more intrigued by the fact that you can't share a location from Google Maps if you're not connected - at least in my case, when offline and trying to share a location, the sharing sheet (or whatever it's called) doesn't show up at all.
This is about addressing the containers in docker. It has nothing to do with the local network.