Firefox Community Forum

Firefox recently seems to be crashing randomly when I disconnect from VPN. At least I think it's crashing. This has maybe started a few weeks ago?

What happens is that when I disconnect from my VPN (ProtonVPN), I will randomly not be able to load any pages. If I go to any website, it will just get stuck loading forever. No timeout. I'm able to visit the browsers own pages like settings, some about: pages like about:performance, about:memory, etc.

Why I'm not sure if it's crashing is because the browser itself is not closing, I have to manually close the browser window. Once I close the window manually and wait a while, the crash reporter pops up. If I close the window manually then re-open it, theres a text prompt that shows up telling me Firefox is still open and if I want to close it to re-open Firefox.

I don't think it's the VPN's issue as when I disconnect from my VPN, applications other than Firefox work and have internet connectivity (a separate browser like Chrome, or discord, etc)

What I have tried:

• new Firefox profile
• Using Firefox Nightly
• Various ProtonVPN settings (but I don't think its related to ProtonVPN)
• Various Firefox network settings
• Both Firefox and Firefox Nightly Open, when disconnecting VPN one would stop letting me reach sites but other wouldn't

I have the crash report details (from Firefox and Firefox Nightly) but unsure where best to upload or if it contains any sensitive data.

Maybe pasting this is fine? Both mention this at the last few lines of details: Winsock_LSP: Hyper-V RAW : 2 : 34 : 1 : 1 : 0x20026 : 0x8 : %SystemRoot%\system32\mswsock.dll :  : 1234191b-4bf7-4ca7-86e0-dfd7c32b5445

AF_UNIX : 2 : 1 : 1 : 0 : 0x20026 : 0x8 : %SystemRoot%\system32\mswsock.dll :  : a00943d9-9c2e-4633-9b59-0057a3160994 
MSAFD Tcpip [TCP/IPv6] : 2 : 23 : 1 : 6 : 0x20066 : 0x8 : %SystemRoot%\system32\mswsock.dll :  : f9eab0c0-26d4-11d0-bbbf-00aa006c34e4 
MSAFD Tcpip [UDP/IPv6] : 2 : 23 : 2 : 17 : 0x20609 : 0x8 : %SystemRoot%\system32\mswsock.dll :  : f9eab0c0-26d4-11d0-bbbf-00aa006c34e4 
MSAFD Tcpip [RAW/IPv6] : 2 : 23 : 3 : 0 : 0x20609 : 0xc : %SystemRoot%\system32\mswsock.dll :  : f9eab0c0-26d4-11d0-bbbf-00aa006c34e4 
MSAFD Tcpip [TCP/IP] : 2 : 2 : 1 : 6 : 0x20066 : 0x8 : %SystemRoot%\system32\mswsock.dll :  : e70f1aa0-ab8b-11cf-8ca3-00805f48a192 
MSAFD Tcpip [UDP/IP] : 2 : 2 : 2 : 17 : 0x20609 : 0x8 : %SystemRoot%\system32\mswsock.dll :  : e70f1aa0-ab8b-11cf-8ca3-00805f48a192 
MSAFD Tcpip [RAW/IP] : 2 : 2 : 3 : 0 : 0x20609 : 0xc : %SystemRoot%\system32\mswsock.dll :  : e70f1aa0-ab8b-11cf-8ca3-00805f48a192 
RSVP TCPv6 Service Provider : 2 : 23 : 1 : 6 : 0x22066 : 0x8 : %SystemRoot%\system32\mswsock.dll :  : 9d60a9e0-337a-11d0-bd88-0000c082e69a 
RSVP TCP Service Provider : 2 : 2 : 1 : 6 : 0x22066 : 0x8 : %SystemRoot%\system32\mswsock.dll :  : 9d60a9e0-337a-11d0-bd88-0000c082e69a 
RSVP UDPv6 Service Provider : 2 : 23 : 2 : 17 : 0x22609 : 0x8 : %SystemRoot%\system32\mswsock.dll :  : 9d60a9e0-337a-11d0-bd88-0000c082e69a 
RSVP UDP Service Provider : 2 : 2 : 2 : 17 : 0x22609 : 0x8 : %SystemRoot%\system32\mswsock.dll :  : 9d60a9e0-337a-11d0-bd88-0000c082e69a 
MSAFD L2CAP [Bluetooth] : 2 : 32 : 1 : 256 : 0x20006 : 0x8 : %SystemRoot%\system32\mswsock.dll :  : 9fc48064-7298-43e4-b7bd-181f2089792a 
MSAFD RfComm [Bluetooth] : 2 : 32 : 1 : 3 : 0x20026 : 0x8 : %SystemRoot%\system32\mswsock.dll :  : 9fc48064-7298-43e4-b7bd-181f2089792a

XPCOMSpinEventLoopStack: default: nsHttpConnectionMgr::Shutdown

And I also see this for maybe why the browser itself doesn't "crash" MozCrashReason: Shutdown hanging at step AppShutdownNetTeardown. Something is blocking the main-thread.

If it's okay to share the crash reports then I can add them.

facebook loads extremely only on firefox. I have turned off enhanced tracking protection which only makes slower ??? Edge has no problem what so ever. Other sites on firefox are not as slow but are still slow. May have to stop using firefox , its very annoying.

yesterday my email wasn't opening links and then Firefox acted strangely so I cleared the cache. (I'm on windows 11) Today when I clicked on the app icon it created a shortcut instead of launching Firefox. What is going on? I have used FireFox as my default browser for the past 15 or more years and I don't want to switch to Chrome or MS Edge.

I was able to open Firefox by going to the app under settings - but that is not how I have done it before.

Any thoughts as to what is happening?

For some reason, I am locked out of signing in to Mozilla VPN. I have twice changed my password & recovery key, & then been returned to the app to login & it has failed to do so?

I have websites that are blocked on one of my computers and not another. Why? VPN is not on. Server Not Found

Firefox can’t connect to the server at link.mail.beehiiv.com What can you do about it?

Try connecting on a different device. Check your modem or router. Disconnect and reconnect to Wi-Fi.

Can the quantity of tabs ever get so large that finally one more tab wont open? What are the max count of tabs recommended, and when should they be removed to start over?

bp-a4692efd-4959-4507-84b4-a38f70260617

Firefox keeps crashing I've followed all steps, still crashing - memory / disk/ system/restart/troubleshooting I did have animaze installed but removed and still crashing

Above is latest crash report

I sell on vinted, which generates a PDF label to print. Some of the courier sites add a lot of nonsense text to their labels, which I cover up with a white box to save ink. These edited PDFs used to then print just the label without the nonsense text, but since a recent Firefox update they have started printing an empty page instead. Saving the edited PDF and then opening it again in Firefox does not work. The edited labels still print okay in Microsoft Edge.

I am still waiting for you to remove Show All in config:editor. It was unnecessary and unwanted by your users. Just allow us to access config:editor the way we used to before this moronic change.

for any website playing a video, if i skip ahead or go back, the audio breaks. Its not a smooth transition like chrome. It is like it suddenly cuts off the audio and then begins at the skipped ahead point.

Just checking Facebook "download your information" and got this:

```

     {
       "timestamp": 1781017200,
       "label_values": [
         {
           "label": "Date",
           "value": "2026-06-09"
         },
         {
           "label": "Business or organization",
           "value": "Firefox",
           "description": "The business or organization that added you to a Custom Audience"
         }
       ]
     },

```

Is this actual Firefox passing my info to Meta, or some Meta scammer pretending to be Firefox?

On that date, I had Global Privacy Control turned on in Firefox.