Firefox Support Forum

I cannot find any way to report problems, this seems to be the only way. When I try to open any PDF file, I have to Browse to find my pdf viewer (Flexipdf 2022). I do that and also check your "Do this automatically" option. Every time I try to open a pdf after that I still have to go through all the same Browse steps. I also set up Flexipdf 2022 in the Applications section of General Settings (Portable Document Format (PDF) (application/pdf)) and it is just deleted or never saved. The next time I look or try to use it, it’s gone. This is obviously a bug in your system, please correct. Thank You.

Since sometime in August 2021, I suspect after an update, occasionally when I launch Firefox it reports that it was unable to restore a previous session. I do not have the option to open previous sessions selected. On other occasions it starts properly with a blank page as it is configured to do.

Am I missing a setting?

It is not a major problem, I can simply enter a URL or search string in the address bar and it works properly for the rest of the session.

It is happening both on my Windows 8.1 Pro and Windows 10 Pro PCs running the 64-bit version of Firefox.

Any suggestions will be appreciated. Thank you.

My Premium Malwarebytes has detected a Trojan on outbound, I usually Play Runescape, Have been playing for 15 Years +, 2 hours before this, i played on Runescape with no problems, since opening Runescape Launcher, game did not load, had reference also to firewall, since 2 hours prior Nothing had changed. i then rechecked firewall, and all was OK, I had added all URL from Runescape to exception, even company name, jagex.com I also use Norton 360, however Norton did not pick up Trojan, any suggestions? I was thinking of uninstalling Firefox, then installing again, I didn't do this as i have many Sites saved and wasn't sure if they would also be deleted, I play this game to keep my mind active, as i can't walk sit or stand for more then a couple minutes, ...

Below are details of Trojan: Cheers Ralph:

Log Details- Protection Event Date: 11/28/21 Protection Event Time: 9:40 PM Log File: 954b6ada-5037-11ec-bdb7-80fa5b790f8f.json

-Software Information- Version: 4.4.11.149 Components Version: 1.0.1513 Update Package Version: 1.0.47808 License: Premium

-System Information- OS: Windows 10 (Build 19042.1348) CPU: x64 File System: NTFS User: System

-Blocked Website Details- Malicious Website: 1 , C:\Program Files\Mozilla Firefox\firefox.exe, Blocked, -1, -1, 0.0.0, ,

-Website Data- Category: Trojan Domain: classicmoto.rs IP Address: 45.147.54.18 Port: 443 Type: Outbound File: C:\Program Files\Mozilla Firefox\firefox.exe

Hello! I am in a work environment and I am trying to determine if there is something in our security systems that is preventing Firefox from running properly. Once Firefox is installed, it works the rest of the day with no issue but almost daily the morning after, it will start to open then instantly crash. When I check the crash logs, it shows in most of them: Modules - Filename: umppc14210.dll Version: 6.28.14210.0 Debug Identifier: B9143DE260194C88AB48EFD6782C9EAF1 Debug File Name: umppc.pdb Signed By: Microsoft Windows Hardware Compatibility Publisher

Some are this instead: Filename: umppc14105.dll Version: 6.27.14105.0 Debug Identifier: CE458B39D37A4C65A60024BBACED6EB31 Debug File Name: umppc.pdb Signed By: Microsoft Windows Hardware Compatibility Publisher

Crash Reasons from multiple crashes: Crash Reason EXCEPTION_ILLEGAL_INSTRUCTION Crash Address 0x00007ffa13aacf87 Crash Reason EXCEPTION_ACCESS_VIOLATION_READ Crash Address 0x0000000000000000 Crash Reason EXCEPTION_ACCESS_VIOLATION_EXEC Crash Address 0x00007ff90af7b040 Crash Reason EXCEPTION_ILLEGAL_INSTRUCTION Crash Address 0x00007ff8d4fbea86 Crash Reason EXCEPTION_ILLEGAL_INSTRUCTION Crash Address 0x00007ff8d4fbea86 Crash Reason EXCEPTION_ILLEGAL_INSTRUCTION Crash Address 0x00007ff8d4fbea86 Crash Reason EXCEPTION_ACCESS_VIOLATION_READ Crash Address 0x000005234242b500

The Module xul.dll listed is almost always first in the list multiple times. Crashing Thread (0), Name: GeckoMain Frame 0 Module xul.dll Signature GetDoubleWrappedJSObject(XPCCallContext&, XPCWrappedNative*) Source js/xpconnect/src/XPCWrappedNativeJSOps.cpp:222 Trust context

When using the dark theme from Firefox, Google searching seems to break completely as well as some pages will not load which may be related to this.

I have already tried uninstalling Firefox, deleting all of the folders, then reinstalling with a freshly downloaded installer (Even tried the beta one) with same results. It seems potentially MAYBE related to how long ago I closed Firefox before I shut down (Like Firefox is trying to save something to a secure location and times out, then it will work but if it hasn't timed out, then it crashes... or this is my guess)

The Signature seems to change randomly for the crash between crashes. ID: aea4dc0b-5fb6-42e7-994a-d2a960211123 Signature: GetDoubleWrappedJSObject ID: 34686de9-c473-4df3-bb6d-cb8160211123 Signature: mozilla::dom::XMLHttpRequestMainThread::OnRedirectVerifyCallback ID: aa6c916b-141c-491b-998c-a90bf0211123 Signature: nsLineBreaker::AppendText ID: 915ecd96-399a-4257-995a-77bb30211123 Signature: fdlibm::acos ID: 995d35ff-7beb-4230-98d6-4839b0211123 Signature: fdlibm::acos ID: e3144271-4bd4-4bcf-8222-9f6060211123 Signature: fdlibm::acos ID: 60dc1a34-a80d-4e9e-94f5-1ed530211123 Signature: nsDisplayCanvas::CreateWebRenderCommands

I really am tired of constantly reinstalling Firefox but I do not want to use Chrome or Edge unless websites require it.

I am running Firefox 94.0 in a couple of Linux Mint systems.

My main desktop computer, with a 3.8 GHz 6-core AMD Ryzen 5 processor on an MSI B450-A PRO MAX MB with 16 GB RAM, has had Linux Mint 19.3 installed for over a year. Just today, Firefox, which has also been installed in this OS for a long time, exhibited extreme slowness. I did an online search, and found that the slowness was cured by using the Troubleshoot Mode, but none of the suggestions I found solved the problem in normal mode. So, I went into Settings and turned off hardware acceleration. That solved the problem, somewhat ironically. The hardware acceleration seemed to accomplish deceleration instead. So my browser works, but there is something wrong with hardware acceleration in Firefox.

On a new install of Linux Mint 20.04, I recently experienced frequent crashing of Firefox just after clicking on a link. I tried online solutions, which didn't help, but then I turned off - - guess what - - hardware acceleration, and no more crashes. That is what motivated me to turn off hardware acceleration in Firefox on my Linux Mint 19.3 machine today.

I don't really have a problem to solve, but I don't know of a better place to submit a bug report, so I am hoping you will pass this on to the developers.

Last night my Firefox 94.0.2 was hacked. When running Firefox, it would lock up my desktop. It disabled Norton Security, it disable other installed security software, and it disabled Windows System Restore. The hacker put up a message claiming to be Microsoft Support, with a phone number to call for help. This was a scam. I ran Firefox refresh, and that removed the hacker's program from Firefox, but then I had to do a full repair of my Window's installation. To protect my system, and prevent this from happening again, I added "xpinstall.enabled = false" into about.config. Please let me know if this will prevent a web site from installing a dangerous hack into Firefox, or if there is something else that I need to do. I have used Firefox for years, and have never encountered this problem before. Firefox is my favorite browser, but I am now afraid to use it. Please advise me what to do. Thanks, Jim

I've been having an interesting problem with Firefox for the past couple of months regarding only Soundcloud, where after the first visit to the website it won't load, giving a generic "Sorry! Something went wrong" screen. Firefox will continue to not load the site correctly until I clear the cookies and the cache, which works but only for one visit, and as soon as I close the tab and open soundcloud again or refresh the tab the problem comes back. I have disabled all of my extensions as well as enhanced tracking protection when testing. A firefox refresh also did not solve the problem. The only way I can get the site to behave normally is when using private browsing.

The console is filled with errors regarding javascript files (source URI is not allowed in this document).

Thanks

Hi Folks,

I've used Firefox for years with no problem. Yesterday, I was seeking out a specific font. The website looked legit, but then a security block happened and I don't recall if it was Firefox security or Acronis that flashed a brief "block" announcement. In any case, from that point on, several "racey" websites popped up every time I loaded Firefox. This happened even after I restarted my computer. I then checked to see if I had pop-ups blocked on the Firefox options. I didn't, so I checked the box against pop-ups. But what happens now is Firefox does an attempt to load TWICE with an odd jerk-flash movement. Only one Firefox browser window comes up -- and that's good -- but SOMETHING is still trying to make those "racey" websites load. Why? How?

All of that to say that I'm concerned about security. Should I uninstall Firefox and reinstall?

Thanks for your input! Bob Anderson

https://support.mozilla.org/en-US/kb/customize-firefox-home-screen#w_customize-firefox-home

I believe this info is relevant, but this undated page may be out of date (I am on Windows 10 with 94.0.2 ) -- I do not see the things they refer to:

"Tap the menu button:" which has a URL, a "1" in a box, and a three-vertical-dots array in a red box.

Clicking upper-right-corner icons at random has "disconnected" my account. Just getting in deeper. I bet I have to log in again...

I have tried everything and cannot manage to load any webpage that prompts a reCAPTCHA. The tab immediately crashes.

1- I've tried several webpages. They all work well until a reCAPTCHA pops up, the tab crashes and creates a dump file 2- I tried uninstalling Firefox, including erasing profiles and all Mozilla folders then reinstalling, and selecting refresh. It sill happens. No addons or extensions, and HW acceleration on and off 3- The problems goes away if I run Firefox on Troubleshooting Mode

Version is 94.0.2 (64 bit) running on Windows 10 21H1 on an i7 1165G7

Am I missing something? Is there a way to do a cleaner install?

Thanks for the help!

https://drive.google.com/file/d/1j-RWTilIiqeKjU4PpLClYdpUkvEpzmy3/view?usp=sharing

I didn't change any text settings of purpose, and I'm seeing this across a few different sites. What should I do?

Thank you!

I'm trying to sign-in to my Firefox account, but it won't let me as I'm still signed-in on another device. The other device is my old SSD which failed and can't access anymore. How do I sign-out of the old SSD so I can get access to my Firefox account on my new SSD?

I was downloading a 3 GB file from Mega. Unfortunately this Mega file hosting web site downloads the file into a temporary location through the browser instead of downloading it like a normal download.

Anyways, while I was downloading, at 54% the download got interrupted saying transfer quota exceeded and I need to wait 4 hours to continue download again. and my girlfriend didn't know this so she thought my download already completed and deleted the file :( After 4 hours of waiting I was unable to continue the download since the file is no longer avaliable anymore :/

Now my question is, where this 1.5 GB file gone? I have already checked %AppData%\Mozilla\Firefox\Profiles\myprofile\storage\default\https+++mega.co.nz but it's not there, the folder size is 102 KB. I checked %AppData%\Mozilla\Firefox\Profiles\myprofile\storage\temporary too but that folder is completely empty. Also checked AppData\Local\Temp as well but it's not there either. The size of my Temp folder is just 10 MB.

While I was searching this, I saw some people saying (if I understood correct) the temporary download location of Mega isn't in hard drive, but in the RAM instead. I want to ask can anyone confirm is this actually true? and if so what happens to that space in RAM when download interrupts like this? Does it delete it from RAM automatically when I close Firefox?

Can anyone with knowledge in this regard please help me with this problem :( I am on SSD and already have a very few space left and I don't want to clutter my SSD with 1.5 GB unusuable file :(( Neither want 1.5 GB space got occupied in my RAM :((

Thank you so very much in advance.

Hello,

I try to sync with my work computer (windows 10) but nothing is imported. No bookmark, no password, nothing. I do not have any error message it seems.

What information could be useful to resolve this problem ? thank in advance.

Have been trying to fix this problem - FF works beautifully if Kaspersky Internet Security is OFF but cannot access any websites when it is ON - just this PR_CONNECT_RESET_ERROR page.

Kaspersky support has been assisting but no solutions as yet. Any help from Mozilla is appreciated. This has been going on for 4 days now.

Using FF version 94.0.2 (64-bit) on Windows 10.

I've tried debugging the extension, errors in attachment

Hello together.

I'm experiencing the same problem as discussed in this cases that is not solved yet: https://support.mozilla.org/en-US/questions/1312836 https://support.mozilla.org/en-US/questions/1333547 https://support.mozilla.org/en-US/questions/1321038

Symptoms: After FF starting it loads pages fast enough. After several minutes of using pages start be loading very slow. Loading slowness increases until it becomes blocked continuously. Reload button has no effect. I tried everything from here: https://support.mozilla.org/en-US/kb/firefox-cant-load-websites-other-browsers-can - No effect.

Work around done: When windows is loading in Safe Mode the problem disappeared. If I disable Windows Defender Firewall the the problem disappear and appear after firewall enabling again in several minutes (same as after FF restarting) When I go to <current network settings> and switch Network Profile from Public to Private or from Private to Public the problem disappear but goes back just in several minutes (same as after FF restarting). Windows 10 Restorehealth has no effect, and reports that everything is OK with system files (DISM.exe /Online /Cleanup-image /Restorehealth ) The most strange thing Windows 10 In-place Upgrade has no effect.

I found out the core of problem is that Windows Firewall is blocking FF internal interprocess communication on local TCP ports. Yes, you would say it is not possible and firewall doesn't affect local port communication but in my case it is a fact. I used the ProcessMonitor from Windows Sysinternals, and Windows Defender Firewall with Advanced Security log. Screenshots shows this fact. On first two lines from Firewall log you see a Local Port Communication blocking, on ports 1401 and 1400. Next Screenshot from ProcessMonitor shows (see blue colored lines) that it was exactly FF communication, where I was trying to reload a page several times.

Any ideas what to do with it? It seems like Microsoft’s way fighting a concurrent web browsers, but I hope it isn’t.

Now I use FF version 94 but the problem starts from 88. I was trying FF downgrading to version 75 with no effect.

Good People, Followed screen pop-up to make Firefox default browser. Now all *.pdf files have Firefox icons and open as .html pages, I think! Seen some solutions, but for older versions of windows and followed procedure: go to Adobe, Edit, Preferences, General, 'Select Default PDF Handler', as dialog Does not have Adobe Reader XI, step two was Change to Adobe Reader DC, clicked continue, but NO Windows Configuration Screen appears. Using Version 94.0.2 (64bit) with Windows 10. Also, help answer said not necessarily a Firefox problem, also within Adobe Reader. Not comfortable with changes to be made in the registry. James

Several weeks ago, because it seemed to be a Gmail-tab-only problem, Firefox Support advised us to contact Gmail Support.

It is now clear that the problem is with the Firefox browser. The attached screenshot shows an example of an affected tab.

Please fix this. Multiple versions of the same tab waste RAM and other memory, especially on a limited-memory device such as a laptop.

The browser crashes frequently, even if I restore the bookmarks and some necessary plug-ins after reinstalling. there are 3 reports submitted by your interface.

report id: bp-61a7e2c3-3ce8-4856-9941-587d20211122 bp-e7ef6793-584d-448b-ac6d-1c0a90211122 bp-4a81c954-4ee7-4726-b8cd-7105b0211122