afaik, it is enough. Nothing is saved elsewhere on your local machine.
afaik, no problems to expect, but be however aware that by erasing the directory you also lose your trading history. If you want to save you trading history you can export it under csv format.
- use torbrowser systematically for all crypto related websites
- see Privacy concern - #11 by ManfredKarrer (some very good advices there)
- https://www.privacytools.io/