I want to use syncthing with devices that rarely are online at the same time. I thought maybe I could simultaneously run it on a raspberry pi (or similar) with an ssd attached, which would always be on and bridge that gap.

Is this reasonable, and what specific hardware would you recommend?

It's my first project of this kind, so I thought I'd get some second opinions before buying the hardware.

Browser: Waterfox (Mozilla-based)
Add-ons in question: NoScript and maybe some Dark Reader
Cause: Adjusting these add-ons' individual website settings on the local computer
Issue: Syncing the add-on adjustments across all computers

I read that the best way to do this is to sync the entire Waterfox (Firefox) profile. Would this work, or has anyone else successfully done this? I've been using Meld to painfully, manually merge export files into a master that I then import back into each PC on a roughly monthly basis, and I feel like there's just gotta be a simpler way to sync 'em up.