Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Firefox 7 intermittently stops loading pages, requires restart to correct. Why?.

  • 45 replies
  • 544 have this problem
  • Last reply by John99

more options

During normal usage Firefox will suddenly stop loading all pages in all tabs/windows. Every currently loading page remains blank, with the usual 'Connecting to ____' message. Any new tabs or windows opened, or any new page requests, get stuck in the same loop. The program itself does not hang and, other than failing to load pages, performs normally. No change in behaviour with all add-ons disabled. Seems to happen with any website, but seems to happen more often on pages with any elements that take excessively long to load. Only current solution is to close program and restart.

This is not a router/connectivity issue, IE and other programs can connect fine while the issue is occurring. Full system virus scan came up empty (Sophos/Ad-Aware/WinDefender). I believe I first starting having the problem with FF6, feels like it has become more frequent with FF7.

Chosen solution

I may have found a solution to this problem here (well, at least Firefox has been working again for the last few hours, not sure if it will prove to be a long term solution or not).

As it says in the linked article, type about:config into the address bar, find network.http.max-connections and change its value from 256 to 48.

I have absolutely no idea why this works but it seems to. According to my resource monitor Firefox still seems to be using a ridiculous amount of memory and disk, and my cpu fan is still going crazy, but at least websites are loading again!

Does this fix the problem for anyone else?

Read this answer in context 👍 41

All Replies (20)

more options

Tried changing the value to 48 but it made no difference: it hangs consistently, no matter what site I am trying to load. I ditto the postings of both fccorp and archeocyathan (both 4 days ago)--have been through everything suggested; nothing helps. Finally threw out v7.0.1 and re-loaded v3.6.12 from another computer. Mozilla should at the very least make a previous version available on their web site until they fix this--can't use Firefox 7 the way it is. Attached a screen shot that shows a typical "waiting" message in the bottom left corner when the hang starts.

more options

I was on the beta channel(v7) few months back and saw this problem. Reverting it back to release channel(v6.x) fixed the issue. Didn't have the time to notify the team about it also at that time I thought since it is beta one is suppose to expect problems. But now they have released v7 in the release channel and looks like the problem is still there.

My Solution:

All those who don have the time to help in debug revert back to the v6.x

And those of you who have the time or interested in sorting this problem carry on.

Message to firefox: If it takes longer to fix this issue My advice will be to revert the release channel back to v6.x ASAP. People are very annoyed by this and will switch to chrome or some other browser pretty fast.

Modified by thegrizzlyking

more options

It is not a recommended course of action to revert back to Firefox 6. Firefox 3.6.23 is still supported and secure you could revert back to that.

You will note there is a workaround posted above about changing a preference, that may be an easy workaround that solves your problem. That is also detailed in a newly revised KB article:

Note also there is another cause of hangs in firefox, relating to the places.sqlite database that stores bookmarks for that see

Note also a firefox developer is even asking users seeing this problem to post information as attachments in

Modified by John99

more options

This blog post fixed it for me!

The max connections fix did nothing for me.

I have a really large bookmark collection that is over 3mb in size. I believe that this was choking the "places" portion of Firefox. I think the fix essentially cleans up your bookmark database to be more easily read by Firefox.

Either way, I followed the directions on that blog and now Firefox is super FAST and freeze free now. Its only been a few hours, but it seems like it is really fixed. Page loads are faster, switching between tabs is faster, scrolling up and down pages is more responsive, and making new bookmarks is much quicker as well.

Thank you for the help!

- Ryan

more options

I've changed network.http.max-connections to 48 @ FF7.0.1 and tested it! This really solves the problem ! I'm back to Firefox 7 without problems! I'm also using "memory fox" add which reduces a lot memory leak! Nice tip!!

more options


I have this problem also and until know I cursed my shitty internet connection and my shitty router until I realised is Firefox related.

I am a big fan of firefox using it from the beginning but this caused me to make some deeper research on Chrome and even Opera.

Please fix asap :) I have the issue from v 6 if I remember correctly.

I've attached a file which could help you (snapshot during the ff hang). I opened lots of tabs, mostly blogs.

Thanks, Ciprian

Process: firefox.exe Pid: 3512

Name Description Company Name Version {6AF0698E-D558-4F6E-9B3C-3716689AF493}.2.ver0x000000000000001a.db {AFBF9F1A-8EE8-4C77-AF34-C647E37CA0D9}.1.ver0x000000000000006a.db {c45c406e-ab73-11d8-be73-000a95be3b12}.xpi {DDF571F2-BE98-426D-8288-1A9A39C3FDA2}.2.ver0x0000000000000002.db advapi32.dll Advanced Windows 32 Base API Microsoft Corporation 6.1.7601.17514 apisetschema.dll ApiSet Schema DLL Microsoft Corporation 6.1.7600.16385 apphelp.dll Application Compatibility Client Library Microsoft Corporation 6.1.7601.17514 arial.ttf arialbd.ttf AudioSes.dll Audio Session Microsoft Corporation 6.1.7601.17514 browsercomps.dll Mozilla Foundation C_1250.NLS cfgmgr32.dll Configuration Manager DLL Microsoft Corporation 6.1.7601.17621 clbcatq.dll COM+ Configuration Catalog Microsoft Corporation 2001.12.8530.16385 comctl32.dll User Experience Controls Library Microsoft Corporation 6.10.7601.17514 comdlg32.dll Common Dialogs DLL Microsoft Corporation 6.1.7601.17514 cookies.sqlite-shm cour.ttf crypt32.dll Crypto API32 Microsoft Corporation 6.1.7601.17514 cryptbase.dll Base cryptographic API DLL Microsoft Corporation 6.1.7600.16385 cryptsp.dll Cryptographic Service Provider API Microsoft Corporation 6.1.7600.16385 cscapi.dll Offline Files Win32 API Microsoft Corporation 6.1.7601.17514 cversions.2.db cversions.2.db cversions.2.db cwAgent.dll CurrentWare Agent Library Codework Inc. 3.4.4400.0 d2d1.dll Microsoft D2D Library Microsoft Corporation 6.1.7601.17563 d3d10.dll Direct3D 10 Runtime Microsoft Corporation 6.1.7600.16385 d3d10_1.dll Direct3D 10.1 Runtime Microsoft Corporation 6.1.7601.17544 d3d10_1core.dll Direct3D 10.1 Runtime Microsoft Corporation 6.1.7601.17514 d3d10core.dll Direct3D 10 Runtime Microsoft Corporation 6.1.7600.16385 dbghelp.dll Windows Image Helper Microsoft Corporation 6.1.7601.17514 devobj.dll Device Information Set DLL Microsoft Corporation 6.1.7601.17621 dhcpcsvc.dll DHCP Client Service Microsoft Corporation 6.1.7600.16385 dhcpcsvc6.dll DHCPv6 Client Microsoft Corporation 6.1.7600.16385 dnsapi.dll DNS Client API DLL Microsoft Corporation 6.1.7601.17570 dui70.dll Windows DirectUI Engine Microsoft Corporation 6.1.7600.16385 duser.dll Windows DirectUser Engine Microsoft Corporation 6.1.7600.16385 dwmapi.dll Microsoft Desktop Window Manager API Microsoft Corporation 6.1.7600.16385 DWrite.dll Microsoft DirectX Typography Services Microsoft Corporation 6.1.7601.17563 dxgi.dll DirectX Graphics Infrastructure Microsoft Corporation 6.1.7601.17514 EhStorShell.dll Windows Enhanced Storage Shell Extension DLL Microsoft Corporation 6.1.7600.16385 ExplorerFrame.dll ExplorerFrame Microsoft Corporation 6.1.7601.17514 feclient.dll Windows NT File Encryption Client Interfaces Microsoft Corporation 6.1.7600.16385 firefox.exe Firefox Mozilla Corporation freebl3.dll NSS freebl Library Mozilla Foundation FWPUCLNT.DLL FWP/IPsec User-Mode API Microsoft Corporation 6.1.7601.17514 gdi32.dll GDI Client DLL Microsoft Corporation 6.1.7601.17514 georgia.ttf georgiab.ttf georgiai.ttf icm32.dll Microsoft Color Management Module (CMM) Microsoft Corporation 6.1.7600.16385 iertutil.dll Run time utility for Internet Explorer Microsoft Corporation 9.0.8112.16437 imagehlp.dll Windows NT Image Helper Microsoft Corporation 6.1.7601.17514 imm32.dll Multi-User Windows IMM32 API Client DLL Microsoft Corporation 6.1.7601.17514 intl3_tsvn.dll LGPLed libintl for Windows NT/2000/XP and Windows 95/98/ME Free Software Foundation IPHLPAPI.DLL IP Helper API Microsoft Corporation 6.1.7601.17514 kernel32.dll Windows NT BASE API Client DLL Microsoft Corporation 6.1.7601.17651 KernelBase.dll Windows NT BASE API Client DLL Microsoft Corporation 6.1.7601.17651 libapr_tsvn.dll Apache Portable Runtime Library Apache Software Foundation libaprutil_tsvn.dll Apache Portable Runtime Utility Library Apache Software Foundation linkinfo.dll Windows Volume Tracking Microsoft Corporation 6.1.7600.16385 locale.nls lpk.dll Language Pack Microsoft Corporation 6.1.7600.16385 marlett.ttf mdnsNSP.dll Bonjour Namespace Provider Apple Inc. micross.ttf MMDevAPI.dll MMDevice API Microsoft Corporation 6.1.7601.17514 mozalloc.dll Mozilla Foundation mozcpp19.dll User-Generated Microsoft (R) C/C++ Runtime Library Mozilla Foundation mozcrt19.dll User-Generated Microsoft (R) C/C++ Runtime Library Mozilla Foundation mozjs.dll mozsqlite3.dll SQLite Database Library msasn1.dll ASN.1 Runtime APIs Microsoft Corporation 6.1.7601.17514 mscms.dll Microsoft Color Matching System DLL Microsoft Corporation 6.1.7601.17514 msctf.dll MSCTF Server DLL Microsoft Corporation 6.1.7600.16385 msimg32.dll GDIEXT Client DLL Microsoft Corporation 6.1.7600.16385 msvcp90.dll Microsoft® C++ Runtime Library Microsoft Corporation 9.0.30729.4940 msvcr90.dll Microsoft® C Runtime Library Microsoft Corporation 9.0.30729.4940 msvcrt.dll Windows NT CRT DLL Microsoft Corporation 7.0.7600.16385 mswsock.dll Microsoft Windows Sockets 2.0 Service Provider Microsoft Corporation 6.1.7601.17514 NapiNSP.dll E-mail Naming Shim Provider Microsoft Corporation 6.1.7600.16385 nlaapi.dll Network Location Awareness 2 Microsoft Corporation 6.1.7601.17514 normaliz.dll Unicode Normalization DLL Microsoft Corporation 6.1.7600.16385 nsi.dll NSI User-mode interface DLL Microsoft Corporation 6.1.7600.16385 nspr4.dll NSPR Library Mozilla Foundation nss3.dll NSS Base Library Mozilla Foundation nssckbi.dll NSS Builtin Trusted Root CAs Mozilla Foundation nssdbm3.dll Legacy Database Driver Mozilla Foundation nssutil3.dll NSS Utility Library Mozilla Foundation ntdll.dll NT Layer DLL Microsoft Corporation 6.1.7601.17514 ntdll.dll NT Layer DLL Microsoft Corporation 6.1.7601.17514 ntmarta.dll Windows NT MARTA provider Microsoft Corporation 6.1.7600.16385 ntshrui.dll Shell extensions for sharing Microsoft Corporation 6.1.7601.17514 nvwgf2um.dll NVIDIA D3D10 Driver, Version 280.26 NVIDIA Corporation ole32.dll Microsoft OLE for Windows Microsoft Corporation 6.1.7601.17514 oleaut32.dll Microsoft Corporation 6.1.7601.17676 omni.jar places.sqlite-shm plc4.dll PLC Library Mozilla Foundation plds4.dll PLDS Library Mozilla Foundation pnrpnsp.dll PNRP Name Space Provider Microsoft Corporation 6.1.7600.16385 profapi.dll User Profile Basic API Microsoft Corporation 6.1.7600.16385 propsys.dll Microsoft Property System Microsoft Corporation 7.0.7601.17514 psapi.dll Process Status Helper Microsoft Corporation 6.1.7600.16385 rasadhlp.dll Remote Access AutoDial Helper Microsoft Corporation 6.1.7600.16385 rpcrt4.dll Remote Procedure Call Runtime Microsoft Corporation 6.1.7601.17514 RpcRtRemote.dll Remote RPC Extension Microsoft Corporation 6.1.7601.17514 rsaenh.dll Microsoft Enhanced Cryptographic Provider Microsoft Corporation 6.1.7600.16385 sechost.dll Host for SCM/SDDL/LSA Lookup APIs Microsoft Corporation 6.1.7600.16385 segoeui.ttf segoeuib.ttf segoeuii.ttf setupapi.dll Windows Setup API Microsoft Corporation 6.1.7601.17514 shdocvw.dll Shell Doc Object and Control Library Microsoft Corporation 6.1.7601.17514 shell32.dll Windows Shell Common Dll Microsoft Corporation 6.1.7601.17514 shfolder.dll Shell Folder Service Microsoft Corporation 6.1.7600.16385 shlwapi.dll Shell Light-weight Utility Library Microsoft Corporation 6.1.7601.17514 slc.dll Software Licensing Client Dll Microsoft Corporation 6.1.7600.16385 smime3.dll NSS S/MIME Library Mozilla Foundation softokn3.dll NSS PKCS #11 Library Mozilla Foundation SortDefault.nls srvcli.dll Server Service Client DLL Microsoft Corporation 6.1.7601.17514 ssl3.dll NSS SSL Library Mozilla Foundation sspicli.dll Security Support Provider Interface Microsoft Corporation 6.1.7601.17514 startupCache.4.little StaticCache.dat tahoma.ttf times.ttf TimesNewRomanBold.ttf TimesNewRomanItalic.ttf TortoiseOverlays.dll TortoiseSVN overlay handler shim TortoiseStub.dll TortoiseSVN shell extension client TortoiseSVN.dll TortoiseSVN shell extension client urlmon.dll OLE32 Extensions for Win32 Microsoft Corporation 9.0.8112.16437

Modified by cipriancaba

more options

And the second part of the process dll's user32.dll Multi-User Windows USER API Client DLL Microsoft Corporation 6.1.7601.17514 userenv.dll Userenv Microsoft Corporation 6.1.7601.17514 usp10.dll Uniscribe Unicode script processor Microsoft Corporation 1.626.7601.17514 uxtheme.dll Microsoft UxTheme Library Microsoft Corporation 6.1.7600.16385 verdana.ttf version.dll Version Checking and File Installation Libraries Microsoft Corporation 6.1.7600.16385 WindowsCodecs.dll Microsoft Windows Codecs Library Microsoft Corporation 6.1.7601.17514 wingding.ttf wininet.dll Internet Extensions for Win32 Microsoft Corporation 9.0.8112.16437 winmm.dll MCI API DLL Microsoft Corporation 6.1.7601.17514 winnsi.dll Network Store Information RPC interface Microsoft Corporation 6.1.7600.16385 winrnr.dll LDAP RnR Provider DLL Microsoft Corporation 6.1.7600.16385 winspool.drv Windows Spooler Driver Microsoft Corporation 6.1.7601.17514 wintrust.dll Microsoft Trust Verification APIs Microsoft Corporation 6.1.7601.17514 Wldap32.dll Win32 LDAP API DLL Microsoft Corporation 6.1.7601.17514 wow64.dll Win32 Emulation on NT64 Microsoft Corporation 6.1.7601.17651 wow64cpu.dll AMD64 Wow64 CPU Microsoft Corporation 6.1.7601.17651 wow64win.dll Wow64 Console and Win32 API Logging Microsoft Corporation 6.1.7601.17651 ws2_32.dll Windows Socket 2.0 32-Bit DLL Microsoft Corporation 6.1.7601.17514 wsck32.dll CurrentWare Socks Library Codework Inc. 3.4.4400.0 wship6.dll Winsock2 Helper DLL (TL/IPv6) Microsoft Corporation 6.1.7600.16385 WSHTCPIP.DLL Winsock2 Helper DLL (TL/IPv4) Microsoft Corporation 6.1.7600.16385 wsock32.dll Windows Socket 32-Bit DLL Microsoft Corporation 6.1.7600.16385 xpcom.dll Mozilla Foundation xul.dll Mozilla Foundation

more options

Hi cipriancaba,
You said

I have this problem also and until know I cursed my shitty internet connection and my shitty router until I realised is Firefox related. 

Well if you read the bug, the developer was posting about higher up in this thread, there is a possibility some of these problems may be router related.

The good news is that changing the connections settings as mentioned in one of my posts above may well be a suitable workaround for your problem. Those studying the bug are in fact asking for technically minded posters to supply details of the problems, and run tests to recreate the problem.

more options

Well, I can 100% recreate the problem.. I have Windows 7 64 bits, I have the problem at my office and at home.

If I leave the max-connections at 256, the problem is re-appearing, if I set to 48, the problem is gone.

The easiest way to recreate is to open lots of tabs (open your rss reader and just keep opening tabs from engadget, gizmodo, techrunch, so on..). If the problem doesn't happen, close the browser and restart it. After restarting, go to hsitrory and restore previous tabs. In all my tests, the problem is there and the dll's above were generated by ProcessExplorer and I saw that a firefox developer was asking these details, that's why I posted them.

Btw, adding the option to upload a txt file would make some sense on these forums.

Cheers, Ciprian

more options

OSX 10.6.8 Firefox 7.0.1

Disabled all extensions and add ons. Restarted with add ons disabled. All I get is a new tab called 'new tab' and in the address bar 'go to a website'. Nothing loads at all.

Switching to Chrome for a while.

more options

All I get is a new tab called 'new tab' and in the address bar 'go to a website'. This happens when you have selected to Show a Blank Page under Firefox -> Preferences -> General -> Startup section

You need to set your Homepage

Check and tell if its working.

Modified by Hasan

more options

Any news regarding this annoying problem???

I can't use Firefox for blogging in Blogger as it gets stuck and doesn't load the whole page for creating new posts.

Also, pages liks,, take like 15 minutes to load!!!


more options

Modified by Hasan

more options

The solution is also given in KB article Websites show a spinning wheel and never finish loading_lower-the-max-number-of-http-connections
and that is likely to be kept up-to-date as to the best solutions.

Developers are working to track down this problem, but any fix is more likely to be in firefox 9 now rather than firefox 8. A possible problem is identified with Windows OS and fixes are being tested.

Modified by John99

more options

Thank you both for your recommendations, I've done them but the problem is still there.

I've noticed that if I do a clean install with a clean new profile, everything works. BUT if I copy/paste the contents of my previous profile, problems begin.

A QUESTION: Has disabling an add-on the same effect as uninstalling it?

I've disable almost the addons trying to find the one that could be originating the problem, but the problem is still there.

I hope Mozilla guys find a fix soon.

Thanks again.

more options

Using your previous profile, do this:

-> Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems

Check and tell if its working.

Modified by Hasan

more options

In Safe Mode the problem persists... so it is not a problem of addons I think.

more options

-> Update All your Firefox Plugins

When Downloading Plugins Update setup files, Remove Checkmark from Downloading other Optional Softwares with your Plugins (e.g. Toolbars, McAfee, Google Chrome, etc.)

-> Restart Firefox

-> Troubleshoot issues with plugins like Flash or Java to fix common Firefox problems

Check and tell if its working.

more options

Hi. I've updated plugins and addons but still I can't load some webpages.

I've noticed that there are some addons and plugins that Firefox can't tell if they are Up To Date or Outdated and their status is "Research", like Panda Active Scan or McAfee SiteAdvisor. Should I disable them? Thanks

more options

Try Disabling them then Restart Firefox.

Also try the solutions mentioned in these articles:

Check and tell if its working.

  1. 1
  2. 2
  3. 3