Why does Firefox keep randomly crashing?

For the past couple of days, Firefox will just randomly crash on me when I'm browsing the Internet. There doesn't seem to be any pattern to the crashes. It may happen if I'm on Facebook or watching a YouTube clip. It can happen if I've been on Firefox for 2 hours or 20 minutes, though lately they seem to be happening sooner. Sometimes I'll get the "Firefox has stopped working" dialogue box, but most of the times it just shows loads the Mozilla Crash Report. I was able to get problem details the last time I got the "stopped working" dialogue box:
Problem signature:
Problem Event Name: APPCRASH
Application Name: firefox.exe
Application Version: 24.0.0.5001
Application Timestamp: 522fd29f
Fault Module Name: RPCRT4.dll
Fault Module Version: 6.1.7601.18205
Fault Module Timestamp: 51db9710
Exception Code: c0020043
Exception Offset: 0005cf69
OS Version: 6.1.7601.2.1.0.768.3
Locale ID: 1033
Additional Information 1: f69e
Additional Information 2: f69e60c920b901ae1c3125ca811aee8f
Additional Information 3: f69e
Additional Information 4: f69e60c920b901ae1c3125ca811aee8f
Unfortunately, I don't really know how to read that information and I don't actually know if it is useful. It's all very frustrating because there doesn't seem to be any reason for these crashes. They just happen. Any help in fixing this problem would be greatly appreciated.

I should add, I've re-downloaded Firefox, but that doesn't look like it has helped any. Still get seemingly inexplicable crashes.

Similar Messages

Why does Firefox keep hanging, crashing, sulking, dying when internet connection behaves?

Why does Firefox keep hanging, crashing, sulking, dying when internet connection behaves? Once it renders the page it should forget about the page. Why does it behave when some link is clicked when there is no internet? It should just say internet not available or some crap. Why die, sulk, crash?? I don't get it! 3 series was much much much better!

I should add, I've re-downloaded Firefox, but that doesn't look like it has helped any. Still get seemingly inexplicable crashes.

Why does firefox keep blocking websites that I have gone to in the past

Why does firefox keep blocking websites I have gone to in the past?

From http://watchseries.lt/tips#htw
<pre><blockquote>Why videos do not work for me?
You need Flash Player or DivX Player. Both of these programs are used everywhere online; their size is small and will not harm your computer. You should download them from here:
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Why does my Firefox keep randomly crashing?

I run windows 7, 32 bit pro.
I use a website that keeps randomly crashing, about 5x a day.
There seems no obvious reason for it.
AdapterDeviceID: 0x0152
AdapterVendorID: 0x8086
Add-ons: %7B972ce4c6-7e08-4474-a285-3208198ce6fd%7D:21.0,langpack-fr%40firefox.mozilla.org:21.0,fr-dicollecte%40dictionaries.addons.mozilla.org:4.11
AvailablePageFile: 4237357056
AvailablePhysicalMemory: 1119350784
AvailableVirtualMemory: 102326272
BuildID: 20130511120803
CrashTime: 1373545591
EMCheckCompatibility: true
FramePoisonBase: 00000000f0de0000
FramePoisonSize: 65536
InstallTime: 1369291992
Notes: AdapterVendorID: 0x8086, AdapterDeviceID: 0x0152, AdapterSubsysID: 05851028, AdapterDriverVersion: 8.15.10.2639
D2D? D2D+ DWrite? DWrite+ D3D10 Layers? D3D10 Layers+
OOMAllocationSize: 65536
ProductID: {ec8030f7-c20a-464f-9b0e-13a3a9e97384}
ProductName: Firefox
ReleaseChannel: release
SecondsSinceLastCrash: 11167
StartupTime: 1373541073
SystemMemoryUsePercentage: 69
Theme: classic/1.0
Throttleable: 1
TotalVirtualMemory: 2147352576
Vendor: Mozilla
Version: 21.0
Winsock_LSP: MSAFD Tcpip [TCP/IP] : 2 : 1 : %SystemRoot%\system32\mswsock.dll
MSAFD Tcpip [UDP/IP] : 2 : 2 :
MSAFD Tcpip [RAW/IP] : 2 : 3 : %SystemRoot%\system32\mswsock.dll
MSAFD Tcpip [TCP/IPv6] : 2 : 1 :
MSAFD Tcpip [UDP/IPv6] : 2 : 2 : %SystemRoot%\system32\mswsock.dll
MSAFD Tcpip [RAW/IPv6] : 2 : 3 :
RSVP TCPv6 Service Provider : 2 : 1 : %SystemRoot%\system32\mswsock.dll
RSVP TCP Service Provider : 2 : 1 :
RSVP UDPv6 Service Provider : 2 : 2 : %SystemRoot%\system32\mswsock.dll
RSVP UDP Service Provider : 2 : 2 :
MSAFD NetBIOS [\Device\NetBT_Tcpip_{173BCA34-3602-4823-B8A6-9DFA573CE8D5}] SEQPACKET 1 : 2 : 5 : %SystemRoot%\system32\mswsock.dll
MSAFD NetBIOS [\Device\NetBT_Tcpip_{173BCA34-3602-4823-B8A6-9DFA573CE8D5}] DATAGRAM 1 : 2 : 2 :
MSAFD NetBIOS [\Device\NetBT_Tcpip6_{173BCA34-3602-4823-B8A6-9DFA573CE8D5}] SEQPACKET 2 : 2 : 5 : %SystemRoot%\system32\mswsock.dll
MSAFD NetBIOS [\Device\NetBT_Tcpip6_{173BCA34-3602-4823-B8A6-9DFA573CE8D5}] DATAGRAM 2 : 2 : 2 :
MSAFD NetBIOS [\Device\NetBT_Tcpip6_{D3E0696F-D87F-403D-97AC-83228C02310D}] SEQPACKET 0 : 2 : 5 : %SystemRoot%\system32\mswsock.dll
MSAFD NetBIOS [\Device\NetBT_Tcpip6_{D3E0696F-D87F-403D-97AC-83228C02310D}] DATAGRAM 0 : 2 : 2 :
This report also contains technical information about the state of the application when it crashed.

Start Firefox in Safe Mode to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance).
 To Enable SafeMode 
*You can open Firefox 4.0+ in Safe Mode by holding the '''Shift''' key when you open the Firefox desktop or Start menu shortcut.
* Or open the Help menu and click on the '''Restart with Add-ons Disabled...''' menu item while Firefox is running.
*''Once you get the pop-up, just select "'Start in Safe Mode"''
If it works in Safe Mode and in normal mode with all extensions (Tools > Add-ons > Extensions) disabled then try to find which extension is causing it by enabling one extension at a time until the problem reappears.
Close and restart Firefox after each change via "Firefox > Exit" (Windows: Firefox/File > Exit; Mac: "Firefox > Quit Firefox"; Linux: "Firefox/File > Quit")
* https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode
*https://support.mozilla.org/kb/Safe+Mode
*https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes
Create a new profile as a test to check if your current profile is causing the problems.
See "Creating a profile":
*https://support.mozilla.org/kb/profile-manager-create-and-remove-firefox-profiles
*http://kb.mozillazine.org/Standard_diagnostic_-_Firefox#Profile_issues
Profile Backup and Restore
*http://kb.mozillazine.org/Profile_backup
*https://support.mozilla.org/en-US/kb/back-and-restore-information-firefox-profiles
*http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox

Why does Firefox keep opening 3 random tabs while browsing different websites?

Just to clarify: They are never spam websites. They may be 3 of the same website, but it is always random. I only browse safe websites. This usually happens while Stumbling (StumbleUpon).
For example:
StumbleUpon brought me to this website:
[[http://www.thecreatorsproject.com/blog/5000-fiber-optic-flowers-invade-museum-grounds-in-ifield-of-lighti]]
Then it also opened three of this webpage:
[[https://en.wikipedia.org/wiki/First_Earth_Battalion]]
They have nothing to do with each other. Why does this keep happening? I searched with Anti-Malwarebytes, SuperAntiSpyware and Microsoft Security Essentials. No viruses.
I have Windows Vista Home Basics 32-bit. And is running Firefox 8.0. (This problem existed in 7.0 and previous as well.

I've already done this, and it says nothing is wrong with my system.

Why does firefox keep crashing? I ran a scan and there was no spyware or malware. I uninstalled and reinstalled firefox. It doesn't happen in safe mode.

For some unknown reason firefox keeps crashing on my laptop computer. I mostly just use the internet for surfing and for emailing. It is very frustrating when I am trying to write an email and firefox crashes. I have unistalled and reinstalled firefox. I ran a McAfee scan on the computer and it has no problems with spyware or malware. It doesn't crash in safemode either. I am in safe mode now otherwise it would have crashed multiple times while getting to this page and typing this message.

If Firefox crashes frequently but stops crashing when you are in Safe Mode that is a pretty sure sign that there is something wrong with your individual setup of Firefox on your Windows 7 machine.
(The 99 others claiming to have the same problem this week probably have their own distinct and separate problems - if you are one of those 99 it may make sense to start your own questions about your problems, if you do not see suitable answers).
Many malware problems would continue even in Firefox's [[safe mode]], so the good news is that malware may not be your problem.
Note that safe mode does not disable plugins, you may wish to consider testing with your plugins disabled, just in case they are interacting with something. To temporarily disable plugins use
* '''Firefox button -> Add-ons -> |Plugins|'''
You do not list the Firefox extensions that are in use, maybe one of them is a problem. I suggest you try Firefox with half of them disabled, if that solves the problem, the troublesome add-on may be in the other half, disable them all and then try with half of the other half enabled. (If you have more than a handful of add-ons it is faster testing like that than enabling or disabling one at a time)
One very important question is how do you know Firefox is crashing ? will you please explain exactly what happens, and what if any error messages you are seeing. (If firefox freezes/hangs that may be different from Firefox or the OS crashing, and require different solutions).
On a general note the following articles may help with troubleshooting:
* [[basic troubleshooting]]
* [[troubleshooting extensions and themes]]
* [[http://kb.mozillazine.org/Standard_diagnostic_%28Firefox%29]]
and if the problem is a true crash
* see [[firefox crashes]]

Why does Firefox keep crashing with Mavericks?

I don't want any answers on this, but I would strongly suggest that people should not download Mavericks. I did so today, March 22, and since then Firefox keeps crashing or going into the spinning wheel mode. Once it actually shut down my domputer. Clearly Apple updates are becoming as worthless as windows updates.

I haven't had any issues with Firefox and Mavericks. The only issues I've had have been minor.
I suggest you test in a new User. This will quickly tell you if the problem is system wide or if it's your User's folder that contains the problem.
CREATE A NEW USER
Go to System Preferences --> Create a New User in Accounts. Switch to the New User by logging out/in or use Fast User Switching
Do you still see the issue?
If yes, then the problem is with your base files.
If no, then the problem is in your User's folder.
Download EtreCheck. It will display the important details of your system configuration and highlight old files you still might have around that will affect Mavericks. If you need help with the results, you can copy the results to the Clipboard. and paste on the fourm.
http://www.etresoft.com/etrecheck

Why does Firefox keep crashing?

I have a Mac 10.6.8 and using Firefox browser 31.0. Firefox has been crashing constantly for about 3 weeks. Any thoughts on how I can fix this? Have not changed anything except download updates to Firefox when available. thank you

Are you able to provide any crash ids? https://support.mozilla.org/en-US/kb/mozillacrashreporter

Why does firefox keep changing things up with new versions?

It really bothers me that Firefox keeps changing things, namely the user interface with new versions. They move buttons around like the back / forward, and refresh button. If I don't have the latest version I get prompted to download it each time I open my web browser. Now with this latest update I got a good inch and a half at the top of my screen that should be gray but is transparent and shows my desktop background. Also, I like to right click and 'open link in new' tab a lot, I thought it used to be 'open link in new window' first than 'open link in new tab' second. They switched them around now I'm opening new windows instead of tabs from clicking the second option by habit. Its not that big of a deal but why keep changing it up when I'm comfortable with what I know.

You can use Themes or Personas to change the display of Firefox browser.
* https://addons.mozilla.org/en-US/firefox/themes/
* https://addons.mozilla.org/en-US/firefox/personas/
You can Middle-click a link using Mouse or use '''CTRL + Left-click''' shortkeys to open a link in a New Tab. See these articles:
* [[Mouse shortcuts]]
* [[Keyboard shortcuts]]
Check and tell if its working.
Not related to your problem but some of your Firefox Plugins are out-dated, so you need to Update them.
-> Update All your Firefox Plugins by visiting the following link:
* http://www.mozilla.com/en-US/plugincheck/
* '''When Downloading Plugins setup files, Remove Checkmark from Downloading other Optional Softwares with your Plugins (e.g. Toolbars, McAfee, etc.)'''

Why does Firefox keep freezing/locking up?

This has been going on for at least a year. Every time I update Firefox I hope the issue will be resolved, but if anything it's worse.
I have tried uninstalling/reinstalling. I reset. I turned off Hardware acceleration. I updated all of my plugins and Firefox. I tried Safe Mode. I turned off protected mode in Flash.
It has something to do with flash, I'm sure. I used flash blocker and it seemed to help, but not totally. I'll open a tab and it will freeze. Says (Not Responding). Little green processing circle will freeze as well. This happens with flash intensive sites, which these days is most sites. I tried using IE and the sites worked. It's gotten to the point that I actually have to stop using Firefox. What's the deal? Why is it STILL like this? The only resolution is to open task manager and close Firefox.

Here is mine, games freezing
Application Basics
Name: Firefox
Version: 29.0.1
User Agent: Mozilla/5.0 (Windows NT 5.1; rv:29.0) Gecko/20100101 Firefox/29.0
Crash Reports for the Last 3 Days
All Crash Reports
Extensions
Name: Ads no more
Version: 2.1
Enabled: true
ID: {a3a5c777-f583-4fef-9380-ab4add1bc2a2}
Name: Advanced SystemCare Surfing Protection
Version: 1.0
Enabled: true
ID: [email protected]
Name: Microsoft .NET Framework Assistant
Version: 0.0.0
Enabled: true
ID: {20a82645-c095-46ed-80e3-08825760534b}
Name: RoboForm Toolbar for Firefox
Version: 7.9.6.7
Enabled: true
ID: {22119944-ED35-4ab1-910B-E619EA06A115}
Important Modified Preferences
browser.cache.disk.capacity: 358400
browser.cache.disk.smart_size_cached_value: 358400
browser.cache.disk.smart_size.first_run: false
browser.cache.disk.smart_size.use_old_max: false
browser.cache.memory.capacity: 65536
browser.display.show_image_placeholders: true
browser.places.smartBookmarksVersion: 6
browser.search.useDBForOrder: true
browser.sessionstore.upgradeBackup.latestBuildID: 20140506152807
browser.startup.homepage: https://www.google.com/
browser.startup.homepage_override.buildID: 20140506152807
browser.startup.homepage_override.mstone: 29.0.1
browser.tabs.loadInBackground: false
browser.tabs.warnOnOpen: false
browser.urlbar.autocomplete.enabled: true
dom.mozApps.used: true
extensions.lastAppVersion: 29.0.1
general.useragent.extra.brc:
network.cookie.prefsMigrated: true
network.http.max-connections: 48
network.http.max-connections-per-server: 16
network.http.max-persistent-connections-per-proxy: 16
network.http.max-persistent-connections-per-server: 8
network.http.pipelining.maxrequests: 8
network.http.request.max-start-delay: 0
places.database.lastMaintenance: 1400799219
places.history.expiration.transient_current_max_pages: 80475
plugin.disable_full_page_plugin_for_types: application/pdf
plugin.expose_full_path: true
plugin.importedState: true
plugin.state.npdeployjava: 0
plugin.state.npdrmv: 0
plugin.state.npwpf: 0
print.printer_HP_Photosmart_7510_series.print_bgcolor: false
print.printer_HP_Photosmart_7510_series.print_bgimages: false
print.printer_HP_Photosmart_7510_series.print_colorspace:
print.printer_HP_Photosmart_7510_series.print_command:
print.printer_HP_Photosmart_7510_series.print_downloadfonts: false
print.printer_HP_Photosmart_7510_series.print_duplex: 6619245
print.printer_HP_Photosmart_7510_series.print_edge_bottom: 0
print.printer_HP_Photosmart_7510_series.print_edge_left: 0
print.printer_HP_Photosmart_7510_series.print_edge_right: 0
print.printer_HP_Photosmart_7510_series.print_edge_top: 0
print.printer_HP_Photosmart_7510_series.print_evenpages: true
print.printer_HP_Photosmart_7510_series.print_in_color: true
print.printer_HP_Photosmart_7510_series.print_margin_bottom: 0.5
print.printer_HP_Photosmart_7510_series.print_margin_left: 0.5
print.printer_HP_Photosmart_7510_series.print_margin_right: 0.5
print.printer_HP_Photosmart_7510_series.print_margin_top: 0.5
print.printer_HP_Photosmart_7510_series.print_oddpages: true
print.printer_HP_Photosmart_7510_series.print_orientation: 0
print.printer_HP_Photosmart_7510_series.print_page_delay: 50
print.printer_HP_Photosmart_7510_series.print_paper_data: 1
print.printer_HP_Photosmart_7510_series.print_paper_height: 11.00
print.printer_HP_Photosmart_7510_series.print_paper_name:
print.printer_HP_Photosmart_7510_series.print_paper_size_type: 0
print.printer_HP_Photosmart_7510_series.print_paper_size_unit: 0
print.printer_HP_Photosmart_7510_series.print_paper_width: 8.50
print.printer_HP_Photosmart_7510_series.print_plex_name:
print.printer_HP_Photosmart_7510_series.print_resolution: 6619235
print.printer_HP_Photosmart_7510_series.print_resolution_name:
print.printer_HP_Photosmart_7510_series.print_reversed: false
print.printer_HP_Photosmart_7510_series.print_scaling: 1.00
print.printer_HP_Photosmart_7510_series.print_shrink_to_fit: true
print.printer_HP_Photosmart_7510_series.print_to_file: false
print.printer_HP_Photosmart_7510_series.print_unwriteable_margin_bottom: 0
print.printer_HP_Photosmart_7510_series.print_unwriteable_margin_left: 0
print.printer_HP_Photosmart_7510_series.print_unwriteable_margin_right: 0
print.printer_HP_Photosmart_7510_series.print_unwriteable_margin_top: 0
privacy.clearOnShutdown.cookies: false
privacy.cpd.cookies: false
privacy.sanitize.migrateFx3Prefs: true
privacy.sanitize.sanitizeOnShutdown: true
privacy.sanitize.timeSpan: 4
storage.vacuum.last.index: 1
storage.vacuum.last.places.sqlite: 1399131870
user.js Preferences
Your profile folder contains a user.js file, which includes preferences that were not created by Firefox.
Graphics
Adapter Description: ATI Radeon HD 2400 PRO
Adapter Drivers: ati2dvag
Adapter RAM: Unknown
Device ID: 0x94c3
DirectWrite Enabled: false (0.0.0.0)
Driver Date: 11-16-2012
Driver Version: 8.970.100.7000
GPU #2 Active: false
GPU Accelerated Windows: 1/1 Direct3D 9
Vendor ID: 0x1002
WebGL Renderer: Google Inc. -- ANGLE (ATI Radeon HD 2400 PRO Direct3D9 vs_3_0 ps_3_0)
windowLayerManagerRemote: false
AzureCanvasBackend: skia
AzureContentBackend: cairo
AzureFallbackCanvasBackend: cairo
AzureSkiaAccelerated: 0
JavaScript
Incremental GC: true
Accessibility
Activated: false
Prevent Accessibility: 0
Library Versions
NSPR
Expected minimum version: 4.10.3
Version in use: 4.10.3
NSS
Expected minimum version: 3.16 Basic ECC
Version in use: 3.16 Basic ECC
NSSSMIME
Expected minimum version: 3.16 Basic ECC
Version in use: 3.16 Basic ECC
NSSSSL
Expected minimum version: 3.16 Basic ECC
Version in use: 3.16 Basic ECC
NSSUTIL
Expected minimum version: 3.16
Version in use: 3.16

Why does Firefox continue to crash?

Can someone please suggest why Firefox continues to crash when attempting to download a file. It happens every time, without fail.
* I have deleted the downloads.sqlite file (more than once) to no effect.
* I have disabled AVG firewall etc - to no effect.
* Firefox originally crashed on the latest version, so I downgraded to v5.0.1 - to no effect. I have checked using AVG and an online virus/spyware checker and can find no infection.
* I have submitted 17 crash reports since 29 September, but when I right click on any of them, and try to open in a new tab, I receive the following messge: “We couldn't find the OOID you're after. If you recently submitted this crash, it may still be in the queue.”
My OS is Vista Business 32 bit. Thank you for any help & advice.

(For the record, from "More system details")
Crash ID
See below please 
More Information
Here is a list of 'not received' crash reports:
Report ID --------------------------------------------- Date Submitted
bp-ff03aa8a-e680-4821-b260-864932111012 13/10/2011 12:31 a.m.
bp-44dead09-627a-449e-ac48-5a18a2111012 13/10/2011 12:30 a.m.
bp-bc42e81f-b31e-48fd-bd1b-6dad22111012 13/10/2011 12:26 a.m.
bp-5feaf006-257e-4fc3-9df5-9b8792111012 13/10/2011 12:24 a.m.
bp-84325d98-4938-4ed2-b574-ca6b12111012 13/10/2011 12:22 a.m.
bp-ef70207e-8a15-4c35-b763-7eb4b2111012 12/10/2011 11:55 p.m.
bp-20b38fa4-dbf6-4dd7-bff9-aee782111011 12/10/2011 12:03 a.m.
bp-63568c58-0826-4839-9839-b35512111010 11/10/2011 11:36 a.m.
bp-054a8e03-070b-479c-a6d0-9cd292111005 6/10/2011 5:42 p.m.
bp-32b490c5-1c99-486e-961b-6d1fa2111003 4/10/2011 6:50 p.m.
285f5b2f-121c-4303-aa7a-594af8461227 3/10/2011 12:27 p.m.
bp-beeb682a-5c13-4dbf-82f4-5cdfe2111001 2/10/2011 4:49 p.m.
bp-65965bd2-f6c1-488e-8cde-657802110929 30/09/2011 12:51 p.m.
bp-40b59c9f-5450-48c6-aec6-8f96e2110929 30/09/2011 12:37 p.m.
bp-140e8655-c044-47d9-a177-557bb2110929 30/09/2011 12:37 p.m.
092324db-f7ae-4e78-9280-801dd7a2b356 29/09/2011 12:12 p.m.
bp-e1a02380-6dbb-4bb0-9883-453d72110928 29/09/2011 12:12 p.m.
P.S. all of the available crash reports I checked show:
Signature: rapporttanzan5.dll@0x614c
More info, from http://kb.mozillazine.org/Firefox_crashes#Trusteer_Rapport
[http://www.trusteer.com/product Trusteer Rapport] (an application promoted by some banks for malware protection) may cause Firefox to crash. If you use this software, try disabling it. If that stops the crashes, try updating the software to the latest verion, uninstall the program if you don't need it, or contact [http://consumers.trusteer.com/report-problem Trusteer Support].

Why does flash keep on crashing when I try to play my video?

Every time I try to play the video I've created in flash, it keeps on crashing. It also crashes when I run through the timeline. Please help!

Jason1974 wrote:
While i'm in safari and i try to watch certain videos or play online games it says missing plug-in
Download and install the latest flash plugin only from the adobe flash download page. I believe safari is disabling or removing older versions of the flash plugin.

Why does Firefox keep crashing when I use it on my Dell Precision computer w/XP operating system?

Well, this is embarrassing.
Firefox is having trouble recovering your windows and tabs. This is usually caused by a recently opened web page.
You can try:
Removing one or more tabs that you think may be causing the problem
Starting an entirely new browsing session

If Firefox crashes frequently but stops crashing when you are in Safe Mode that is a pretty sure sign that there is something wrong with your individual setup of Firefox on your Windows 7 machine.
(The 99 others claiming to have the same problem this week probably have their own distinct and separate problems - if you are one of those 99 it may make sense to start your own questions about your problems, if you do not see suitable answers).
Many malware problems would continue even in Firefox's [[safe mode]], so the good news is that malware may not be your problem.
Note that safe mode does not disable plugins, you may wish to consider testing with your plugins disabled, just in case they are interacting with something. To temporarily disable plugins use
* '''Firefox button -> Add-ons -> |Plugins|'''
You do not list the Firefox extensions that are in use, maybe one of them is a problem. I suggest you try Firefox with half of them disabled, if that solves the problem, the troublesome add-on may be in the other half, disable them all and then try with half of the other half enabled. (If you have more than a handful of add-ons it is faster testing like that than enabling or disabling one at a time)
One very important question is how do you know Firefox is crashing ? will you please explain exactly what happens, and what if any error messages you are seeing. (If firefox freezes/hangs that may be different from Firefox or the OS crashing, and require different solutions).
On a general note the following articles may help with troubleshooting:
* [[basic troubleshooting]]
* [[troubleshooting extensions and themes]]
* [[http://kb.mozillazine.org/Standard_diagnostic_%28Firefox%29]]
and if the problem is a true crash
* see [[firefox crashes]]

Why does firefox keep crashing my PC?

I have been using firefox for years now and up until last week I have not had any problems. However, firefox started crashing my PC and forcing it to restart and my registry started getting all thrown out of whack!
I have uninstalled and reinstalled firefox several times, repaired my disks, defragged, and scanned for viruses.
Why is this happening????

Hello,
Certain Firefox problems can be solved by performing a ''Clean reinstall''. This means you remove Firefox program files and then reinstall Firefox. Please follow these steps:
'''Note:''' You might want to print these steps or view them in another browser.
#Download the latest Desktop version of Firefox from http://www.mozilla.org and save the setup file to your computer.
#After the download finishes, close all Firefox windows (click Exit from the Firefox or File menu).
#Delete the Firefox installation folder, which is located in one of these locations, by default:
#*'''Windows:'''
#**C:\Program Files\Mozilla Firefox
#**C:\Program Files (x86)\Mozilla Firefox
#*'''Mac:''' Delete Firefox from the Applications folder.
#*'''Linux:''' If you installed Firefox with the distro-based package manager, you should use the same way to uninstall it - see [[Installing Firefox on Linux]]. If you downloaded and installed the binary package from the [http://www.mozilla.org/firefox#desktop Firefox download page], simply remove the folder ''firefox'' in your home directory.
#Now, go ahead and reinstall Firefox:
##Double-click the downloaded installation file and go through the steps of the installation wizard.
##Once the wizard is finished, choose to directly open Firefox after clicking the Finish button.
Please report back to see if this helped you!
Thank you.

Why does Firefox keep opening new Windows rather than a new Tab in the current window?

I have " Open a new Tab in the current Window" select in Preferences.
Why then does this version (Version 4) keep opening new Windows, rather than new Tabs in the current Window.
This feature worked fine in 3.6.1.3, but in Version 4, it is a frigging pain in the rigging!
C'mon, Mozilla - time for an URGENT update ...

That issue can be caused by an extension that isn't working properly.
*https://support.mozilla.com/kb/Troubleshooting+extensions+and+themes
Start Firefox in [[Safe Mode]] to check if one of the extensions or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox (Tools) > Add-ons > Appearance/Themes).
*Don't make any changes on the Safe mode start window.
*https://support.mozilla.com/kb/Safe+Mode

Why does Firefox keep randomly crashing?

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