All Products Support Forum

Hello Firefox, How do I get the white scissors screenshot to work? When I download the photo I want to save to My Documents and open the containing folder, all I see is a saved blue screen. Please help! Malcolm.

This has been an issue for well over 3 years(Firefox claims this is a suspect site--yea, right--the US NAVY?)-At least we were previously able to access the site by "accepting the risk"

Since I just downloaded the latest Firefox update yesterday, now I can't get to the site at all

Please tell me how I can delete the latest Firefox 'update' so I can again access the Navy Weather site--I mean, like we are in the middle of the storm season here in Fla. Navy Weather is critical to our preparedness actions--

Please help with this-- Thank you, Gary

everything in the menu bar will not work or appear when clicked on after i update to the newest version of Firefox, Nor will any add-ons or extensions load. i am left with a blank page. this can only be corrected if i restart the computer. this has happened since version 88.0

Like several others, I have been getting this error. My wife relies critically on using Barclays for two charities, and it is driving her mad! I have noticed that when this error appears, rre-sending the current URL in full seems to restore normal operation. It did not appear until 91.0.2 arrived.

Firefox automatically updated today and I cannot open my game website to full screen. The display looks like a phone app displayed on a 15" monitor. It's too small to play a game. Windows 10, Dell Inspirion 15" (all drivers up to date), Firefox 91.02 64bit What is going on?

Hello dear Nerds

With the last update the Bookmarks have a wide distance when listed. Too wide! I have to scroll down endlessly to find things. Before they were neatly narrow and you could see twice as much. Kindly repair this next time please. Or can I do this? Best Ursula Zürich

I'm using Firefox Version 91.0.2 (64-bit) on the latest version of Windows 10 0n a HP laptop. After the last 3 Firefox updates, I have not been able to access the internet unless I restart in troubleshooting mode. All other browsers work great. Help, can't figure out what is wrong. I'm also using McAFee, and have checked all settings. Regards, John

blocked access to website. I can't access a website for software I use to sign into my account there to send a request. I unblocked it in the settings - cookies - but it still keeps me from opening it. this is the message on the screen "Cookies required to use Firefox To continue signing in using Firefox, allow cookies to be stored on this device. You might see this screen more than once."

So I go to Bing but I would prefer to use firefox. Why is it so hard to release a website??? What is the problem? Edith

SHORT SUMMARY:

A few specific direct downloads from a third-party server successfully finish in Regular browsing mode but fail half-way in Incognito mode. This is reproducable on numerous tries and persists between Firefox restarts, system reboots, and ISP changes. This difference between Regular and Incognito remains even when the requests that the browser sends are fully word-for-word identical, down to the DNT=1 in the request. There are no issues with downloads in Google Chrome on the same machine, and similarly no issues in Incognito mode in an old ESR Firefox (v52) on a really old laptop with WinXP. This problem ONLY appears in Firefox 92. ========================================

FULL DETAILS:

I'm using the latest public release of Firefox, 92.0.1, on Windows 8. I have a habit of using Incognito mode most of the time, and I found out that certain downloads fail in Incognito tabs - but succeed in Regular tabs. A few examples:

http://down.360safe.com/cse/360cse_official.exe http://down.360safe.com/cse/360cse_9.5.0.122.exe http://down.360safe.com/cse/360cse_9.5.0.114.exe http://down.360safe.com/cse/360cse_9.0.1.162.exe

They are direct links to the .exe setups of various versions of an obscure browser called 360 Extreme Browser, recommended for use with WinXP on obsolete hardware since it's supposedly very lightweight. You can run them through VirusTotal if you want. The first link always points to the latest release, the other links are specific releases.

When I open any of them, I am first presented with the regular download dialog box, while Firefox automatically starts downloading the file to %TEMP% in the background, without waiting for my decision (as it always does):

https://i.imgur.com/0D6pH4Z.png

... then, a couple seconds later, I'm presented with the "source file could not be read" error.

https://i.imgur.com/3f6StGQ.png

When I click OK, the first dialog box also disappears, and there is no trace of the (failed) download left in the download widget in the top right.

Alternatively, I can try to be very fast, and as soon as the first dialog box appears, I can quickly click "Save File" and press Enter in the folder selection window that appears. That way, I can confirm the download before it gets a chance to fail. But it fails anyway, except this time I can see the incomplete file in my destination folder, and the failed download in the list of downloads in the top right corner of Firefox. This download fails about 5-15 MBs into the file - it's different between different attempts.

It is my understanding that the "nature" or "mechanism" of the fail is the same, but if it happens while it's downloading to %TEMP% and I haven't selected the folder yet, then I'm presented with an explicit error message and there is no trace of it in the download history, and if it happens when I've already selected the folder, then there is no explicit error message and the failed download is displayed in the download history.

In the latter case, I can then press "Retry download" in the download history. Then, the download will successfully restart (not from zero, but from the percentage that it failed at) and will successfully complete. But the FIRST try, initiated by the tab ("by the page"?) and not by the "download history" widget in the corner, ALWAYS fails at some point between 5-15 MBs.

========================================

INVESTIGATION AND LOGS AND LOTS OF TECHNICAL DETAILS

So you might say, that third-party server is acting weird and is probably misconfigured. But:

• This download ALWAYS SUCCEEDS without any problems in Regular (not Incognito) tabs. It ALWAYS FAILS in Incognito.
• This download ALWAYS SUCCEEDS in Google Chrome that I have on this same machine, both in Regular and in Incognito.
• This download ALWAYS SUCCEEDS in Firefox 52.9 ESR on a really obsolete laptop with WinXP that I have, connected to the same network(s), both in Regular and in Incognito.

To sum up, this fails VERY SPECIFICALLY in Incognito mode in Firefox 92 (current modern version) and NOWHERE ELSE.

All download attempts that are successful (non-Incognito FF 92, Google Chrome, FF 52.9 ESR...) result in a downloaded file with the same correct size and checksum. The download that is successfully RESTARTED after failing in Incognito (read details above) also results in a file with the same size and checksum.

I am not aware of any software on this machine that would be interrupting the download, such as antivirus. In any case, it's interrupted when it reaches a different random size on each different attempt, and it only affects Incognito Firefox and nothing else - not Regular tabs of FF and not Chrome. I have also tried two different ISPs - one that provides me with Ethernet at my place, and my mobile phone ISP. Same behavior between them. The only third-party plugin that I have in Firefox is uBlock. I disabled it completely and this didn't change anything.

I've inspected the requests and responses, using Firefox's own dev tools.

REGULAR TAB (not incognito) = SUCCESSFUL DOWNLOAD

https://pastebin.com/xzXXJDEt (so as not to clutter this message with long request listings)

INCOGNITO TAB: FAILED DOWNLOAD

https://pastebin.com/Nq0txZ9P (same reasoning)

The differences are: Incognito mode forces HTTPS, sends Sec-Fetch- entries in the GET request, and also sends DNT = 1. Everything else is the same.

I then went to Firefox settings and enabled sending DNT *all the time*, even in Regular (non-incognito) tabs. I also tried to download explicitly from the https:// URL in Regular (non-incognito) mode, just like Incognito mode forces https. This resulted in a request that is sent from a Regular tab but is 100% identical to the request sent from Incognito mode. Read below:

https://pastebin.com/0QCpKqBZ (same reasoning for hosting on Pastebin)

You can check that this request from a Regular (non-incognito) tab is now word-for-word identical to the request from an Incognito tab. Yet, the download from Incognito STILL fails at ~10 MBs into the file, and the download from Regular STILL succeeds. I fail to see any difference between the requests, whatsoever.

In the Cookies tab, there are "No cookies for this request" for both Regular and Incognito downloads. The Security tab looks 100% identical for Regular and Incognito downloads, and looks like this: https://i.imgur.com/SAhzquW.png (idk how to copy this in plaintext form).

In another online discussion elsewhere while I was troubleshooting this, I was advised to see if network.dns.echconfig.enabled was set to TRUE and to try setting it to FALSE. Not sure what this would change, but I went to check and found that it was already FALSE.

Also, in that discussion elsewhere, I had one more user running Firefox on Windows 10 (according to his publicly displayed user agent) confirm this. But I don't know how to reach him to ask for extensive troubleshooting like mine.

========================================

FINAL SUMMARY:

• Some specific downloads fail halfway in Incognito Mode in latest Firefox
• There are no issues in Regular (non-incognito) mode, or in Google Chrome on this same machine, or in obsolete Firefox 52 on another machine
• This persists across Firefox restarts, reboots, ISP changes
• This difference between Regular and Incognito modes persists even when you change settings so that the sent GET requests are 100% word-for-word identical

Help me troubleshoot this further? Even if this is caused by that third-party server acting up (for whatever reason), how does it tell between my Regular firefox tab and my Incognito firefox tab when the sent requests are the same? And even if this is caused by something else on my machine or in my network, then the same question applies, how can this "something" tell between my Regular and Incognito tabs?

Need to restore some missing bookmarks after upgrading to windows 10 also they are out of order.I am not real good on laptop so please give real detailed instructions I tried importing but not working

I have a problem with Firefox screenshot taking feature. When I open the context menu (by right-clicking) on a webpage and choose "Take Screenshot", then I choose an element in the page, it gets selected. The problem is that when I click "Download", nothing happens! I went to the download folder and didn't see the image! How to fix this problem?

Hi, This PC I am working on now is always seen as a Win 8 machine when I am using Firefox. The machine is a Win 10 unit. All my other units are read as the correct operating system, and as this is the only one that runs Firefox, I believe I should discuss it with you. The problem only is acute when using this to access secure sites or to buy online. The machine is seen as suspect at all times. Also I struggle with Windows Updates deleting and damaging the operations at every tiny "update." I never use Edge. When they make me helpless, I switch to a Mac. Other than placing updates on delay, which works now and then, is there any other way to cut off microsoft? Gregory Burke ...

edited email from public.

Malwarebytes Prem. Reported malware on one of your files.

Website Blocked due to malware

IP 138.68.50.216 Port 443 Type Out bound File c:\program file\Mozilla Fire Fox Firefox.exe

Should I ignore it?

The new version of Mozilla Firefox that auto installed this morning has not migrated my logins or bookmarks. I see the old Firefox folder on my desktop, but don't know how to get the old data into the new Firefox.

I have an account and thought that the bookmarks etc would be saved. when I downloaded the most recent version of mozilla everything went out the window and it stopped working. I had selected not to restore defaults cause it messes with a lot of settings that I didn't want to have to redo again. didn't matter what i did it wouldn't work. ended up having to install a new version of mozilla, how ever my history, bookmarks, etc that I rely on being there where all gone. I need help trying to get everything back please