So after signing in and out of Firefox on both my Macbook and iPhone (because it seems I was syncing with the old, nonexistent tabs for some reason as if they were from a separate phone), I find myself here: I can access, on my phone, the Firefox tabs open on my computer. But when I try and do the opposite, it appears as if I'm not synced at all. I don't know why it's working only one way. Any advice would be appreciated.