Hello! I use Firefox View frequently (particularly the Open tabs panel) and find it useful. However, I think it could be better. In particular, I think that Firefox View could support /session management/.
I use an extension called Tab Session Manager to save windows/tabs that I am not actively using, to get them out of memory / no longer taking up windows on my computer. It lets me save windows/tabs in named groups for different things: for example, a group can be like, Wikipedia articles I have open for researching something. I find this very handy, but the UX of being a separate extension means I do not use it as much as I would like.
I would like to suggest that Firefox View adds a new "Saved sessions" tab, and supports saving tabs / windows to sessions, either from Firefox View itself, or both from Firefox View and the tabbar. I think this would be a useful feature to have integrated into the browser.