how to fix errors
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how to fix errors
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 reprodu… (read more)
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. ========================================
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:
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):
... then, a couple seconds later, I'm presented with the "source file could not be read" error.
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:
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.
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?
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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 interne… (read more)
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
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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
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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?
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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.
The scrollbar is ENORMOUS. It's about 1cm wide and is just annoying. How do I set it back the narrow strip it used to be?
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 wit… (read more)
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
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 "acce… (read more)
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
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… (read more)
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.
My bookmarks seem double spaced. How do I change back?
The above Malware has attached itself to my browser and is blocking many of my searches! Times out and falure to connect messages keep popping up on my screen :( How do … (read more)
The above Malware has attached itself to my browser and is blocking many of my searches! Times out and falure to connect messages keep popping up on my screen :(
How do I get reliable advice on how to remove it?
I do not wish to purchase additonal software I alread use Malwarebytes, Spybot S&D, ccleaner and laso the Firfox promise of 100% security :(
None of these are addressing my problem as they cannot find it which really puzzles me!!
It is another Microsoft hidden gem as this has only started since a recent update to my Win 10
When I do a web search for genuine companies/stories/facebook etc I get this "clickserve.dartsearch.net" listed in the search heading! The search then either times out … (read more)
When I do a web search for genuine companies/stories/facebook etc I get this "clickserve.dartsearch.net" listed in the search heading!
The search then either times out or it blocks access to the person/company I want to visit
I have Malwarebytes scartching their heads and even my VCN do not know what is goinf on :(
Help!! It is driving me crazy over the last week
For the past several updates, it seems that Mozilla is becoming a form of bloatware, trying to be all things to all people. Many of us have been involved in the use of co… (read more)
For the past several updates, it seems that Mozilla is becoming a form of bloatware, trying to be all things to all people. Many of us have been involved in the use of computers for 30 years or so, have got our systems to do what we wish to do - we are not gamers, not webpage entrepreneurs, code-writers etc. who marvel in making programme monstrosities.
My system is set up for the disabled - employing VoIP, IP etc. and you f*k it up with your 'forced' changes - yes, they are supposed to be optional, but you throttle and throttle until we have to push 'yes' to update and then we have to trim away what is necessary - in my instance - tools for the disabled of which you don't seem to give a merde. You are all in your own little worlds and don't realize the breadth of the Mozilla community and who uses it - PARTICULARLY FOR SURVIVAL NEEDS - who do not fit into your preoccupations with becoming bigger and better.
Perhaps you might come out with a slimmed down - remove the McD fats and salt - version so that the rest of us can continue to use Mozilla without it causing out computers from shutting down - which has been a problem since the past 3 updates.
Within the past 3-4 week, I am constantly getting messages that FF has updates. These messages are coming randomly throughout the day and when I select "Dismiss", it upd… (read more)
Within the past 3-4 week, I am constantly getting messages that FF has updates. These messages are coming randomly throughout the day and when I select "Dismiss", it updates anyway. These updates have caused me to lose bookmarks and saved log in for certain websites. This is frustrating. I cannot go through this everyday, all day. This is my work computer and my technology department cannot seem to find or figure out the issue. I no longer have the option to turn off updates. This is happening on my desktop only. No issues with the laptop. Never had issues with FF updates before; updates would occur overnight and bookmarks were never lost. WHAT GIVES?????????? I have attached screenshots. I have even uninstalled and reinstalled the browser. Cannot use Chrome, Edge or IE for the software I use for work; all modules will not work with those browsers. This is a brand new desktop; less than 6 months old.
tl;dr - Refreshed Firefox, most of my profile has restored normally, but not Bookmarks (or Browsing History). I cannot restore Bookmarks from the .json backups, and I do … (read more)
tl;dr - Refreshed Firefox, most of my profile has restored normally, but not Bookmarks (or Browsing History). I cannot restore Bookmarks from the .json backups, and I do not have an HTML backup.
Firefox would not load any pages this morning, even after updating to most recent version (89) and restarting the app then the entire computer, so I refreshed Firefox. Good news is, pages load now! Bad news is my bookmarks all disappeared, and they were still gone even after I made the Bookmarks Toolbar visible. The Import Bookmarks button only gives me the option to import from Internet Explorer or Chrome, but not from previous version of Firefox.
I went to Manage Bookmarks, and the Import and Backup seems to have some recent bookmark back-ups, giving me options for back-ups from today (Monday) then Saturday (last new bookmark), etc. But when I try to import bookmarks this way, it says Unable to process the backup file. My Firefox profile has backups, but only as .json files, no HTML bookmark files, which is the only other importing option. The rest of my profile seems to have imported fine - when I go to my inboxes or regularly visited websites, I'm still logged in.
Strangely, Firefox also seems to have forgotten my browsing history. In the URL bar, it'll show my search history, but not my visited pages, which makes the lack of Bookmarks even more aggravating and harder to deal with.
Edit: I restarted the app again and this time, my bookmarks were in place, and my browsing history is back when I type into the URL bar. I do not know how to mark this question as solved or delete this question.
When I open any website and wants to see one pdf-file then firefox download that one and do not show this in a new tab. How can I change this?
Never signed up to Account Wizard, but it's bugging me often. How can i deleted this nuisance for GOOD ?