Firefox also syncs bookmarks, passwords, etc. The nice thing about firefox is that it also syncs history, which chrome (last I checked) did not do. History sync is great if you use a site like HN on multiple machines; you can just visually skip all the visited links, or focus on the visited ones if you're looking for something you saw before.

Fx also syncs add-ons meanwhile. I somehow missed this but discovered it recently when I reset my browser profile.

Chrome syncs history for me, but I could not tell you if this is strictly Chrome or the Google Account web history (which can be managed separately from Chrome). Also: Google Now settings come into play here. It is all starting to feel a bit confusing.

You also have the option of syncing to your own server.

Better than chrome, in my opinion. I switch between my tablet, my phone, my desktop, and laptop, and have access to all my bookmarks, passwords, etc. I don't have tab sync enabled, but that's just personal preference.

Not only can you sync, you can even run your own sync server.

Not answering to your point, but stating that as almost always in browser history in the last 12 years, this feature was first introduced in Opera.

I use Firefox Sync to access tabs on other computers. I haven't tried the mobile version though.

It is decent. Although the browser is not exactly impressive since it needs a lot of memory, hangs sometimes and has a weird UI. I really hope they get it together, because page rendering is, apart from font-weirdness sometimes, actually really good.