Firefox crashed and then wouldn't open even in safe mode. I installed Ver 6.1 and still FF won't open.,

Firefox crashed unexpectedly and wouldn't restart. I rebooted and tried both regular start and safemode w/o add-ons and it still won't start. I then upgraded to Ver 6.1 and still won't open in safe mode. I'm using Vista 32 bit.

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Firefox plug in container has stopped working, even in safe mode with plug ins disabled

My firefox keeps crashing every 5 - 10 minutes. Sometimes I get a windows error message saying "firefox plugin container stopped working", but most times I don't. These are the actions I've taken so far, with no effect:
1. Updated all my plug-ins
2. Run firefox in safe mode with plug-ins disabled
3. Uninstalled and reinstalled firefox
4. Run an AVG scan which turned up nothing
Can anyone offer advice on how to fix this (very annoying) problem?
I've had to write this in IE because firefox wouldn't stay open long enough for me to copy and paste it into the text box.

Try creating a new Profile by following the steps from [[Managing Profiles]] [[Troubleshooting extensions and themes]] and also [[The Adobe Flash plugin has crashed]]

Firefox 5 craches when loading any website, even in safe mode

Every time after I opening Firefox 5, if I don't enter any links its works. but few second after I entered a link and firefox begins to load it, Firefox is not responding to anything. this problems happens even when I open Firefox in safe mode.
I don't know anything more about it, ther is no message about crach, there is no reports in about:crashes, its just hanging every time.

Please read the [[Basic Troubleshooting]] article to try and narrow down the cause.

Firefox crashes constantly after about 5 min (not in Safe mode)

Basic info: using Firefox 14, was working fine until i came back from vacation, fired up my PC, and updated 3 things, Adobe Flash, Windows 7 Ultimate (64 bit), and AMD Catalyst control center with the new 12.8 update, then restarted.
Have slowly been attempting to pin down the cause. Uninstalled Flash, firefox still crashes. Tried moving the Mozilla folder to desktop so I could simulate a reset, firefox crashed anyway, so i put the old folder back.
Read some troubleshooting pages on the firefox page and went down the list making sure all was updated and then tried running in Safe mode. So far no crash and we are going on 15 min here, the best I've seen so far.
Note: Just realized my Java version was out of date, uninstalled the old versions and installed the new version. Will see if this helps.
Note 2: Nope, Firefox is still crashing regularly. Java was not the issue. Didn't think so, but was hoping....

Hi edasvangen, try disabling graphics hardware acceleration in Firefox. You usually need to restart Firefox in order for this to take effect, so save all work first (e.g., mail you are composing, online documents you're editing, etc.).
(WIN) orange Firefox button ''or'' classic Tools menu > Options > Advanced<br>
(MAC) Firefox menu > Preferences > Advanced
On the "General" mini-tab, uncheck the box for "Use hardware acceleration when available"
If you restart Firefox, is the issue resolved (or at least greatly improved)?

Firefox will not load after a update, even in safe mode

I click on the firefox icon
It starts to load with the hourglass on the mouse thig going, then it does not start. I tried in the safe mode,
It will not load
My Computer said it was updating fire fox just before that.
I have removed all the cookies everywhere using that CC Cleaner
I have restarted the computer

Run the Firefox program once as Administrator (right-click: Run as Administrator).
See also:
* http://kb.mozillazine.org/Software_Update (Software Update not working properly)
* [[Software Update Failed]]
If that doesn't help then do a clean reinstall.
Clean (re-)install:
* Download a fresh Firefox copy and save the file to the desktop.
* Firefox 4.0: http://www.mozilla.com/firefox/all.html
* Firefox 3.6.x: http://www.mozilla.com/en-US/firefox/all-older.html
* Uninstall your current Firefox version and remove the Firefox program folder before installing that copy of the Firefox installer.
* Don't remove personal data if you uninstall the current version.
* It is important to delete the Firefox program folder to remove all the files and make sure that there are no problems with files that were leftover after uninstalling.
Your bookmarks and other profile data are stored elsewhere (not in the Firefox program folder) and won't be affected by a reinstall, but make sure that you do not select to remove personal data if you uninstall Firefox.

I changed Java settings and now Firefox crashes as it opens, even in safe mode; how can I fix this?

I was trying to change settings to access the comments section of Slate.com. Right or wrong, I changed a Java setting from -1 to 2. The setting was in about:config and I believe it involved some sort of max. As I cannot open anything, I am not sure.
When I made the change, firefox crashed immediately, Every time I have tried to reopen, even in safe mode, it immediately crashes again and will not reopen.

Hi pternagy,
Sorry you are having problems.
For future reference. Those of us that mess directly with about:config soon learn how to recover from mistakes and what it is sensible to backup. Occasionally backing up your entire profile for instance can be useful and would have probably given you a quick solution of copying over the file from that backup.
*[[Back up and restore information in Firefox profiles]]
Ok on to the subject of trying to get Firefox back as it was:
Find your profile and the file ''prefs.js'' and rename that. (The renamed file is a potentially useful backup.) Firefox is then forced to regenerate the file and will reset your preferences to the default. You can then re open and use Firefox. Next try to get it back to normal.
Trying to manually edit the file ''prefs.js'' is normally a bad idea. However if it is a single pref change it may be possible to directly edit the prefs.js file (whilst Firefox is closed) to get everything back to how it was before . You have the renamed file to work with. Probably best to test all this out in a new additional profile then you only break additional test profiles not working profiles essential to Firefox.
These articles should help you:
* http://kb.mozillazine.org/Prefs.js_file
* [[Reset Firefox preferences to troubleshoot and fix problems#w_solution-2-delete-firefox-preference-files]]_solution-2-delete-firefox-preference-files
*[[Profiles - Where Firefox stores your bookmarks, passwords and other user data#w_finding-your-profile-without-opening-firefox]]#w_finding-your-profile-without-opening-firefox
* http://kb.mozillazine.org/Using_multiple_profiles_-_Firefox
Please post back with how you get on and whether you need any extra help.
Good Luck.

Firefox auto-updated to 3.6.9 last night and now it crashes every time I open the browser, even in safe mode.

Firefox auto-updated to 3.6.9 last night and now it crashes every time I open the browser, even in safe mode.

Hi there,
You could try performing a clean installation: [[Knowledge Base Article]] :
Some Firefox issues can be resolved by downloading a new Firefox installer from Mozilla.com, then closing Firefox, deleting the Firefox application folder (program files) and reinstalling Firefox. If this does not help, or if you would rather completely remove Firefox and start over instead of completing all the troubleshooting steps, follow these steps:
1. Download the latest official version of Firefox from Mozilla.com.
* You should avoid unofficial download sites that bundle Firefox with other software such as the Google Toolbar.
2. If you wish to retain your current profile, you should make a backup copy of it. See Backing up your information for instructions.
3. Uninstall Firefox and make sure you remove the Firefox application (program) folder and your Firefox personal data (user data and settings) - see Uninstalling Firefox for instructions.
4. Reinstall Firefox - see Installing Firefox for instructions.
5. When Firefox is started for the first time, the Import Wizard will appear and a new profile will be created.
6. Verify that the issue no longer appears.
7. If you made a backup of your old profile and wish to restore your old information, see Recovering important data from an old profile. For troubleshooting purposes, only copy the files corresponding to your bookmarks and saved passwords.
8. Reinstall your extensions and themes one by one to determine if any specific one is causing the issue.
source: https://support.mozilla.com/en-US/kb/Basic+Troubleshooting?s=clean+installation&as=s#Clean_reinstall

Firefox crashes as soon as I open it--I cannot even submit a crash report

Firefox crashes as soon as I open it. As far as I know, I haven't been able to submit crash report. I was playing Farmville when it crashed, about a month or two ago, and did submit a crash report then, all this in suppost has been no help, since I can't get Firefox to open in first place. I can only use IE now, so cannot go to about crashes in location bar.
== User Agent ==
Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0)

Hi Deborah,
I would recommend trying to start Firefox in [[Safe Mode]] - if that works, something within FF (extension of some kind) is probably the cause.
Please let us know how above works out, and if we can be of further assistance. Detailed feedback is appreciated and helps us to help you better, plus enables us to better help other users with similar issues.

As soon as I open Firefox it crashes, even in safe mode. I've tried all the options to fix the problem but to no avail. My crash report number is: 1326236186. I hope this helps!

Firefox crashes as soon as I click on the icon. Even in safe mode. I've tried all options of resolving this problem but nothing is working. I really hate using Safari and Chrome. Please help!

Scan your computer in safe mode for bots, malware, trojan's and viruses. Remove any Found and reboot. If Problem still exists, go to control panel, add/remove programs remove firefox. and then download and reinstall firefox. Remember to always close as many running programs like messangers and widgetts when installing any program. This should fix your problem. only other option is to do a system restore to when you were not having any problems, this works 90% of time.

Firefox crashes and when attempting to launch after the crash it won't and throw and error msg that js.3250 can't be found- but same file is in Mozilla directory. I must then download new 3.6.8 and lose all tabs.

# Question
Firefox crashes and when attempting to launch after the crash it won't launch; throwing an error msg that " js.3250 can't be found" - but same file is in Mozilla directory.
I must then download new 3.6.8 and lose all tabs and history.

I have a similar problem. Recently my FF8 has been crashing a lot. It regularly locks up an entire core of my PC and often just shuts down. It has just done it a moment ago and when it started back up it did the whole "this is embarrassing" thing and asked me if I wanted to reload my tabs. I deselected the one that I was trying to view as I suspected that it may have been the cause (unlikely; it was node4.co.uk) but anyway, let's skip it just in case. Click on the button to restore and up pops my homepage only. So all of my other tabs, which I was using for work incidentally, are gone.
This is not the first time this has happened on FF8. It happened a lot recently on FF6 I think it was (so hard to keep track now, Mozilla) and I switched to Chrome as a result, but it turns out that it crashes even more than FF6 did. FF7 was a vast improvement but FF8 is so unstable/unpredictable for me at the moment that I think I'd rather use IE9 than this. It's driving me mental, clearly! I wish I could kill the process manually and have it retry restoring tabs. Hey, there's an idea Mozilla; give us a menu item that allows us to restore the session to how it started to try again or at the very least get a list of the pages we were looking at. They don't show up in Recently Closed Windows and the Restore Previous Session is greyed out too. Gah! Help!

Firefox crashed and after restarting, tabs i had open were gone and weren't in the history either. Didn't give me the option of restoring, how do i get them ba

Firefox crashed and after restarting, tabs i had open were gone and weren't in the history either. It didn't give me the option of restoring, how do i get them back?

Sorry , you probably can not get them back.
You may have bookmarked them, or have them as part of the History previously stored and still searchable, but unfortunately otherwise you are unlikely to get them back. Firefox does to a certain extent back up bookmarks automatically but not the history.
If you get problems with crashes see [[firefox crashes]]

Whenever IE tries to open, Firefox crashes, and cannot be reopened unti I restart the entire system.

Whenever I click on something that brings up IE (not the default!), Firefox crashes, and when I try to reopen it, a screen comes up that is supposed to let me reopen it, but it won't. I have to reboot the system in order to bring up Firefox again. Is there some trick to restarting Firefox after this crash?

Go to the address '''about:crashes''' and tell us your latest crash IDs. We can then look at the data specific to your crash and have a better idea of what is causing the problem.
(Do this in Firefox not IE)

After mozilla firefox crashed and a restart, the Firefox Developer Edition opend - how to open the normal firefox browser ?

after mozilla firefox crashed and a restart, the Firefox Developer Edition opend - how to open the normal firefox browser ?

See if this works for you.
Open up Tools > Options -> General and toggle the first preference - '''Allow Firefox Developer Edition and Firefox to run at the same time''' - to get back to your previous Aurora Profile. It will tell you to restart Firefox.
If there's a check-mark in the box for that pref it shows the Aurora Profile, if you remove that check-mark it shows the Developer Edition Profile.

Whenever I open new tabs Firefox crashes and the browser window closes automatically.what will I do?

I am facing this problem since a month.I never faced this problem before.I always feel good to use Mozilla Firefox as my browser.I used to open multiple tabs in a same browser window.For example- in a tab I logged in to Facebook,at same time I might be downloading songs or something else or open another site in the other tab.It might be 2 or 3 tabs sometimes.But now a days,I am facing the problem whenever I open multiple tabs.Its unusual and so much annoying.The Firefox crashes and the browser window closes showing a messege to send an error report.Please Help me.
N.B. - I am using the Windows service pack 2.
RAM - 2 GB
Hard disk MEmory - 250 GB.

I had this same problem. Seems to be caused by the web developer tool bar FF extension (this started happening after a recent update to that extension). After disabling it, my FF is back to normal :)

Firefox Crashes and Hangs when opened and wont work in safe mode

I use a mac OS X 10.6.7
I have tried to follow your guides but I have been unable to stop firefox from crashing. I disabled all the apps via safe mode and the programme still crashes.
I type in about:crashes but only had time to get the last crash details

Thanks for the note about profile locations.
I deleted mimeType.rdf in my existing profile, still have the same issue - can't view Tools -> Options for the Applications tab, or download a file. Same goes for a new profile - the same issues arise.
Firefox never does crash, I can leave it in this hung state for hours (I left it in a 'not responding' state last night and it was still hung this morning).
I was going to add a screen shot to this post but Firefox hung when I clicked on the 'Browse' button. Perhaps this is an issue when FF tries to interact with my directory structure? Does that get us any leads on what's wrong?
FYI, I currently have my antivirus disabled & not running in the task bar just in case that was interfering somehow.

Firefox crashes! I CAN'T OPEN IT AT ALL!

Firefox will not open ever since my computer shut down unexpectedly, even in safe mode. All my website information in of firefox and I can't remember some of the websites I need to access for school.

See:
*http://kb.mozillazine.org/Firefox_crashes
*https://support.mozilla.com/kb/Firefox+crashes
Create a new profile as a test to check if your current profile is causing the problems.
See "Basic Troubleshooting: Make a new profile":
*https://support.mozilla.com/kb/Basic+Troubleshooting#w_8-make-a-new-profile
There may be extensions and plugins installed by default in a new profile, so check that in "Tools > Add-ons > Extensions & Plugins" in case there are still problems.
If that new profile works then you can transfer some files from the old profile to that new profile, but be careful not to copy corrupted files.
See:
*http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox
*https://support.mozilla.com/kb/Recovering+important+data+from+an+old+profile

Firefox crashed and then wouldn't open even in safe mode. I installed Ver 6.1 and still FF won't open.,

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