I currently use the Chrome browser almost exclusively. I would like to experiment with Firefox and other potential alternatives. However, my reliance on Google's password and payment-info management is a barrier. Whatever one might think about Google, they are very good at security and cross-device data sync, which are both must-haves for these functions. And events like the LastPass data breach make me justifiably paranoid.
What solutions are others using, and why?
Look at https://palant.info/2018/03/13/can-chrome-sync-or-firefox-sync-be-trusted-with-sensitive-data by @WPalant (and the linked update from this year).