AS far as Mozzila is saving auto-fill data (address, phone numbers, etc...) there should be easier way to edit them than searching profile for formhistory.sqlite and edit the values in DB Browser for SQLite...
AS far as I looked (and google) there is no user-friendly way to do that in browser settings
in recent version.
(And yes, being unable to conveniently check and change the data cost me money recently thanks to bad auto-fill, so that finally moved me to submit this).
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I would also help if they used MORE of my large screen to display the long list of autofill I now have due to slight changes in my use of the same information! I wish that every time I changed some info it did not spawn another copy of the information each time!