New firefox has online syncing (requires free account) so you can have your bookmarks, etc. on multiple computers. It is encrypted .
They moved tab up above the address bar which I don't like but that can be changed in Options.
Color too dark so I personalized it in the settings to a lighter theme.
Some power updates to some of the addons I use. Had no issues with my current addons after the upgrade.
Enabled text on the buttons just to make them bigger for my poor eyes.
Reload has moved so that will take some getting used to.
Menu bar disappeared so I enabled it again in settings.
That's it so far for me.
