Firefox - Private Browsing: Data within the current window lost in certain situations
Categories
(Core :: Networking, defect)
Tracking
()
People
(Reporter: elliottabarnes, Unassigned)
Details
User Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:86.0) Gecko/20100101 Firefox/86.0
Steps to reproduce:
I've done my best to describe the below behaviour as best as I can, but please feel free to ask if there's anything else that I can clarify. I've experienced this behaviour as two distinct scenarios; based on the characteristics of each, my presumption is that they're related resulting in a single bug being filed - but if it's felt that these are in fact unrelated, please let me know and I can file another separate bug.
Over the last several hours since upgrading to Firefox 87, I've observed two cases in Private Browsing whereby Firefox appears to forget all previously stored cookies within the current Private Browsing session; all previously opened tabs are still present, but when navigating to a website where a cookie was previously stored within the current Private Browsing window the website in question will re-request the same information that had previously been entered. Unfortunately this behaviour isn't consistent in that if I open a new tab the cookie in question appears to be recognised, but when opening another new tab several minutes later the cookie is missing.
On a similar note, I've also encountered this behaviour when starting a new download from within a newly-opened Private Browsing window. To reproduce:
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Open any direct download URL - a URL that immediately displays the standard Firefox download prompt
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Choose "Open" and allow the browser to pick the appropriate application for the filetype in question, and then click "OK"
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Within the same tab - the address bar of which still contains the URL for the now-downloading file, remove the URL, and enter any URL that will display a web page
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Hit enter, and then check the Downloads list
At this point, you may notice that the previously-started download is now missing, and no trace of the file can be found within the user's temp directory.
It's worth noting that there don't appear to be any URLs that trigger the above to happen; I've been able to observe this on a fresh profile without any installed extensions/plug-ins. It may also be relevant to note that it's entirely possible that this behaviour was also present within earlier builds of Firefox and that this is the first time that I've noticed it.
Comment 1•4 years ago
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The Bugbug bot thinks this bug should belong to the 'Core::Networking: Cookies' component, and is moving the bug to that component. Please revert this change in case you think the bot is wrong.
Comment 2•4 years ago
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Could you try to get a http log for case 1? Note that the log may contain the privacy information, so please send the log to my email directly.
For case 2, it looks like it's a different problem. Could you file another bug for this? Thanks.
Comment 3•4 years ago
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Hello I have tried to reproduce this issue using Firefox 87.0 on Windows 10 but unfortunately I wasn't able to reproduce so. I will add a severity on this issue given there is memory loss.
Could you please answer the following questions in order to further investigate this issue:
- Does this issue happen with a new profile? Here is a link on how to create a new profile: https://support.mozilla.org/en-US/kb/profile-manager-create-remove-switch-firefox-profiles
- Are you using add-ons? If so could you please list them?
- Does this issue occur in the latest nightly version of firefox? Here is a link from where you can download it: https://www.mozilla.org/en-US/firefox/channel/desktop/
Comment 4•4 years ago
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Forgot to add the need info request.
Elliot could you pleas answer the questions in comment 3?
Updated•3 years ago
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Comment 6•3 years ago
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I have tried to reproduce this, but for me, it works fine. Please reopen the bug you can reproduce it.
Description
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