Firefox for iOS Support Forum

Every few months or so, after closing and reopening the app I find that all my stats etc. are gone on any websites that store stats. It's not a cookie selection I made, these websites manage to keep the cookies for weeks or months (exactly 150 days this time according to a streak I had on a daily game) and then one day it's all gone. Is there some sort of cookie expiration setting or storage cap I can change to prevent this?

When I select more than one email to delete using the check boxes next to it, the email next in the list ( with no checkbox checked) gets deleted, too. But not every time. Probably once or twice a day.