I don't know how I never heard about 1Password X. The last time I attempted to switch from macOS to Linux, the lack of 1Pasword was one of the biggest things that made it hard for me.
That said, a browser-based 1Password is really not what I want. I just really don't try web technologies for keeping my passwords safe. If I really was going to use it, this might be the only instance in which I'd actually prefer an Electron version to using it my main browser, just for the additional isolation.
Ben from 1Password here. We offer a couple options for Linux: https://support.1password.com/explore/linux/
Hopefully we can continue to expand upon these offerings. Our ops people are primarily Linux users, so we are aware of the challenges.
That said, a browser-based 1Password is really not what I want. I just really don't try web technologies for keeping my passwords safe. If I really was going to use it, this might be the only instance in which I'd actually prefer an Electron version to using it my main browser, just for the additional isolation.