1500508 - Private browsing retaining accounts info to non-private browsing

Status: RESOLVED INVALID

(Firefox :: Private Browsing, defect)

Description

[Le Troll]

User Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:62.0) Gecko/20100101 Firefox/62.0

Steps to reproduce:

Since a few versions of Firefox, when I log to an account of Exchange Online (Office 365) in a private browsing session, the non-private browsing session also switches to this account!

To reproduce :
1. In non-private browsing, open https://outlook.office365.com and log to an account.
2. In private browsing, open the same page and log to another account.
3. Go back to non-private browsing and hit F5 and it will load the private browsing account!


Actual results:

The Office 365 account from the private browsing is transfered in the non-private browsing!


Expected results:

The private browsing and the non-private browsing should not interfer togeter!

Comment 1

[Matthias Versen [:Matti]]

This is an expected behavior because a session cookie set by the website is available in all browser windows including private browsing ones. You are most likeley dientified by the outlook website with the session cookie.

The private browsing mode garantess only that there is no trace of your visited sits left in the browser after you have closed the browser. 
Usage example: You want to buy a gift for your wife and she should not find any information about your search in the browser history.

There is new feature called "containers" in the Firefox nightly developer editions that will have seperate cookies and things like http basic euthentifications.