I use Firefox as my main browser on all my machines and haven't once been bothered about Pocket or other sync stuff. I vastly prefer it, for moral and technical reasons. I feared the switch from Chrome would be very hard and aggravating but it wasn't.

(The only thing that got me the first few weeks is that opening an incognito window is ctrl+shift+p instead of ctrl+shift+n. Once I got used to that I realized it actually makes sense because ctrl+shift+n re-opens a closed window just like ctrl+shift+t reopens a closed tab.)