Erased bookmarks and browser history
I had an issue with Macbook Pro. Apple support had to wipe and reinstall hard drive. Firefox is my default browser and I was signed in. When we reinstalled Firefox on my new hard drive, I signed in and there's nothing there -- no booksmarks, history toolbar, etc.
Can i still get back that information?
Opaite Mbohovái (1)
If there is no synced device to backup or get the data from everything is gone since doing complete reinstall macOS or Windows O/S everything is gone. Unless they somehow backup your drive but sounds like they didn't do that even. So without a synced device to fall back to the fault lies with Apple support to take the compliant to.
Moambuepyre