Ask HN: Best way to sync browser sessions across platforms?

Like many fellow hackers, I use multiple devices to surf the net every day: mobile phone, iPad, laptop, desktop etc. I always face the problem of losing my browser session when I switch platforms. My straw-man solution is to manually save and restore links of open pages via Google Bookmarks. It works but is pretty inefficient. Do you know a better alternative? If not, what would an ideal cross-browser solution be like?