Browser removed all my email accounts and saved passwords

Unfortunately, probably not … but you need to go to the link I provided, and start learning, studying. AND, at that link, you might get lucky - because, like it says THERE, SOMETIMES

A major lesson for all computer users: Be prepared, with backup routines. Have recovery plans.

Strongly recommended: Two, not one, password management systems. Examples of “the other password manager”:

  • 1Password
  • BitWarden