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Why does Incognito/private browsing store cookies and history?

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Recently transferred from Chrome. My understanding was Firefox private browsing was supposed to work similarly to chrome incognito mode; once you close the browser, all local files are deleted and cookies are cleared.

However, with Firefox it maintains my logins. If I log into an account while private browsing and the close the browser, I’ll still be logged in next time I go to the website even if it’s days later (and I have never logged into this account in a non-private browsing window!)

I never had this issue using chrome incognito, so it seems to be a Firefox problem.

Is this just not something Firefox supports? Is there any way to prevent storage of cookies and private data?

Recently transferred from Chrome. My understanding was Firefox private browsing was supposed to work similarly to chrome incognito mode; once you close the browser, all local files are deleted and cookies are cleared. However, with Firefox it maintains my logins. If I log into an account while private browsing and the close the browser, I’ll still be logged in next time I go to the website even if it’s days later (and I have never logged into this account in a non-private browsing window!) I never had this issue using chrome incognito, so it seems to be a Firefox problem. Is this just not something Firefox supports? Is there any way to prevent storage of cookies and private data?

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I’ve also recently discovered that logins on private browsing copy over to normal browsing.

I.e if I login to a Gmail account in private browsing, then close all tabs, and open Gmail in regular browsing, I’ll be logged into that same account.

My wife has had it happen in Yahoo - she logs in on a private tab, closes everything, then opens Yahoo on a normal tab and is logged into the other account.

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I’m having this issue now too: https://www.reddit.com/r/firefox/comments/1l4kvbi/firefox_keeps_refreshing_pages_on_ios/

Whenever I’m scrolling articles or Reddit, Firefox will randomly refresh the entire page. This happens to my wife a lot on recipes - as she tries to scroll recipes while cooking, it constantly refreshes the page and goes back to the top.

This happens when scrolling down a page, which involves swiping up on your phone, so it’s definitely not the pull down to refresh function.

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