It's a great way to set up Firefox on a new device. Why wouldn't I want to install the same extensions and copy my bookmarks? I wish it also synced toolbar layout so I wouldn't have to remove those weird spacers Firefox adds around the address bar by default every time

Rarely, mostly due to accessing a cool website I found a few days ago on the device I am currently using

I used it accidentally. Now my work PC and my personal laptop have a mishmash of unwanted bookmarks on each

I love Sync!

Except on iOS, where my bookmarks and passwords never actually synch, because it's not really Firefox but a weird skin on Safari because... Apple.

I wouldn't have it any other way. I need to have my desktop and phone browsers synced.

I use it, but when I experimented with data synchronization using Firefox Sync, it simply doesn't work, it is so unreliable and unpredictable that you can't bet on it. It's a real pity, because I wanted to use it for a cool thing, synchronizing data of one website, without having my own server for that website. It failed because Firefox Sync fails.