I can still export bookmarks, but I periodically export my username/passwords (using the password exporter add-on).
of course the password exporter is no longer supported. turtle turds!!
Im sure eventually people will update their add-ons to be compatible with the new firefox quantum. It would have been nice for firefox to give a heads up that things would change so drastically.
At least I wasn't in the middle of frantically buy/selling stock
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