> I use 4 browsers on 3 operating systems on a daily basis, ^^^ This! ^^^ I use Waterfox for general web stuff and Chrome for Google Apps, on Linux and macOS;

> I use 4 browsers on 3 operating systems on a daily basis, ^^^ This! ^^^ I use Waterfox for general web stuff and Chrome for Google Apps, on Linux and macOS; Firefox and Edge when I have to use Windows. I have 2 work laptops, and 3 main home laptops; all dual-boot 2+ OSes; and a desktop iMac. It's a lot of stuff to keep in sync, and Mozilla's Firefox Sync is not much help because it does't talk to the Chrome-based majority of browsers. XMarks was wonderfully useful but it's gone. So this is of significant interest to me.