How can I access my tabs and passswords from old PC (which is the same one after Windows reinstall) when I did fckn logged in Firefox account and synced everyting?!

Hey hey So On my old system I logged into my FF account did 7 syncs just in case whi all were telling that I'll have all of my stuff right away but.... I reinstalled Windows and... installed Firefox and got freaking 00000000 zeeeero tabs or passwords synced.... All of the manual attemps of sync got nothing, absolutely nothing!? So what was the point of online account which does nothing and just give a fake faith??? I would rather do cp -r of local foler as I did for the last 20 years.... But this time I was faked with fake "sync all good" which doesn't work and just fake people