How is it different from the native functionality in Chrome that lets you see (and open) any tabs you have open in Chrome across any device?
By the way, Firefox also has the feature you mention (view tabs that are open on devices).
I'm confused because I open desktop session links from my mobile all the time and I'm curious if there's features I'm missing out on by pushing from one device to another, instead of syncing.
For example, if I open Chrome, I see the tabs open across all my other computers[1] and I usually just resume relevant tabs from there. It keeps me logged in, but sometimes reverts things like filters or sorting (on-page JS) unless it is part of the URL. It doesn't scroll me where I was in a page either, which would be nice.