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First off, for some reason firefox tries to open multiple windows then throw XML errors on windows startup. Second after shutdown all my browsing data deleted

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Problem one: Since a month ago firefox started to open multiple instances when windows starts up, at first only 1 XML runner(something like that) error window opens up and now even up to 3 opens up along with a profile selector window...

Problem two: This does not happen on every shutdown, this happened once and I feel like it was due to an update. Ok so after a shutdown the next morning when I got back to my desktop firefox still did all problem one's stuff plus all my browsing data just disappeared. In the mozilla AppData folder there is still some profiles but I never created a firefox profile before today and never had problems with browsing data just disappearing.