Firefox will not start up at all due to installing add on {e4a8a97b-f2ed-450b-b12d-ee082ba24781}

I think it may be due to me stupidly downloading XAMPP as well as MAMP and now Firefox won't open. It tries to restore all tabs at start up but goes straight to Mozilla crash report. I can't start it in safe mode because it won't even open. Tried downloading Firefox again but hasn't worked.

Try manually removing that addon / extension.
http://kb.mozillazine.org/Extensions_Uninstall#Uninstalling_manually

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Firefox will not start at at all. I have deleted the short cut and reinstalled. still nothing. Help!

Firefox will not start at all. I have deleted the short cut, reinstalled and restarted the computer mutliple times. Everything else on my computer works fine.
== This happened ==
Every time Firefox opened
== August 1st ==
== User Agent ==
Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; GTB6.5; .NET CLR 2.0.50727; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; .NET CLR 1.1.4322; OfficeLiveConnector.1.4; OfficeLivePatch.1.3)

See http://kb.mozillazine.org/Browser_will_not_start_up

Firefox will not start - already tried all suggestions from troubleshooting

I searched google and here a couple times before posting this. My problem is simple, firefox just will not start. I can click on the shortcut, or the icon inside the c/program files/mozilla folder, i can click "run as administrator", i can do run/firefox.exe, and I can do all of these in safe mode, and still none of them work.
For each time that I do try to start it, it will be running in processes so sometimes I'll have 3 or 4 firefox.exe running but it is not actually showing up anywhere.
I already tried going to run/firefox.exe -p to create a new profile and that doesnt work either, because when I do it, nothing happens. I enter firefox.exe -p in the run command box, click enter, and.....nothing , not even the hourglass. I have tried doing it in regular and safe mode also. nothing.
I also tried uninstalling and reinstalling back when this first started happening, it was the first thing I did but no luck.
Also, one thing : 99% of the time nothing at all happens when i try to run firefox. When my computer is in safe mode though, and only if I click "run as administrator" on the firefox icon that is in the program files/mozilla folder, it says "a device attached to the system is not functioning." Thats the only time I ever got a error message though, every other time, and if I click on the shortcut or the start menu icon, nothing will happen, and if i do it outside of safe mode. The only time I get this message is in safe mode and when i click on the icon in the program files mozilla folder.
I read through the troubleshooting article on here and couldnt find any help, so I am hoping someone here can help me out since i f'ing HATE internet explorer, and safari is OK but I prefer firefox, and now safari is starting to give me trouble too so I would really just love to get back with my firefox. hope you can help me. thanks.

you don't think I already tried that?

Firefox will not start, even in Safe Mode. Evidence suggests that this is due to an incompatibility with the latest update of Java.

Firefox will not start in WinXP. (I am sending this from an alternate browser.)
I believe that this is due to some incompatibility with the latest update of Java. I believe that one of the tabs from my previous session included a Java application, and this is causing the difficulty. In recent days, since the last update of Java, I have had difficulty in loading linked pages with Java applications into Firefox, and have needed to switch to a different browser to do this.
Now I cannot even start the browser, presumably due to the presence of a Java application on one of the restored tabs.
When I now try to start Firefox, my ZoneAlarm security s/w presents the message "Java(TM) Quick Starter binary is trying to access the Internet." I click "Allow", but Firefox will not start. If I click "Deny", the same result. The same thing happens when I try to start Firefox in Safe Mode, I cannot even start Firefox in Safe mode.
== This happened ==
Every time Firefox opened
== after recent update of Java

You can try to disable the Java Quick starter and the Java Console extension in the Control Panel > Java.
Control Panel > Java > Advanced tab > Miscellaneous >Java Quick Starter (disable)
You can also disable the Java plugin in Firefox: Tools > Add-ons > Plugins
See [[Troubleshooting extensions and themes]]
See [[Troubleshooting plugins]]

After today's auto download, firefox will not start, at all, any way!

after today's auto upload, Firefox will not come up, at all, no matter what I try
== This happened ==
Every time Firefox opened
== auto update ==
== User Agent ==
Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; DigExt; GTB6.5; .NET CLR 2.0.50727; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)

Have you tried to start Firefox in [[Safe Mode]]?
What about [[Managing profiles]]?
Try to download the latest Firefox (3.6.4) from website. I hope your settings will not be lost; possibly, it was something with network connection, and Firefox updated only one half of itself; that's why I recommend to download it from website and install manually.

Firefox will not start at all ... not even profile mananger will start

After an auto overnight reboot initiated by a Windows update (XP 5.1 SP3) Firefox will not start at all ... not even Profile Manager ... all that happens is a few seconds of hourglass on the cursor and then nothing ... this is happening on two different computers at the same time ... identical symptoms ... any advice?
== After overnight reboot by auto Windows update

I had the problem after I restarted the computer when Firefox indicated that was needed to install updates. After that every attempt to start Firefox resulted in no response at all. I went to my program list and found Firefox Safe Mode. That started OK. I then closed it. After that Firefox started OK.
Bob G.

Firefox will not start at all

New versions of Firefox will not start and only bring up the crash reporter. I've tried starting in safe mode, I've deleted/created new Profiles and I've uninstalled/installed Firefox over and over. I can still download 28.0 and it has no problem opening. Below is the latest Crash ID from 35.0
Crash ID: bp-4ac8fb2d-9a2a-4a6a-a9e4-06cc42150125

hello sid.robinson, this crash is caused by the "Digital Guardian" software by Verdasys that is running on your computer. Please see if there's an update available for that program.

Just installed Firefox 3.6. Firefox will not start and Firefox safemode does not start either. Using Task manager I do not see if started either. If I create a new profile and start from that window, Firefox starts up. I see no error windows/messages. I d

Just installed Firefox 3.6. Firefox will not start and Firefox safemode does not start either. Using Task manager I do not see if started either. If I create a new profile and start from that window, Firefox starts up. I see no error windows/messages. I do have it listed in my Firewall as an exception program with Permit All. What is happening?
== This happened ==
Every time Firefox opened
== After removing Firefox and Reinstalling it. ==
== User Agent ==
Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; GTB6.4; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.04506.30; .NET CLR 3.0.04506.648; MS-RTC LM 8)

If that new profile works then you can transfer some files from the old profile to that new profile (be careful not to copy corrupted files)
See http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox
See also [[Basic Troubleshooting|#Make_a_new_profile|Basic Troubleshooting: Make a new profile]]

After removing system fonts and reinstalling fonts, FireFox will not start

After removing system fonts and reinstalling fonts, FireFox will not start! When I start FireFox the "Mozilla Crash Reporter" opens as if FF just crashed??? I don't see any records in event viewer. I am using FF v3.6.3 on a Windows 7 box. I tried uninstalling 3.6.3 and installing 3.0.18 and had the same problem!
== This happened ==
Every time Firefox opened
== After a uninstalled all fonts including system fonts and then reinstalling system fonts. ==
== User Agent ==
Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0; GTB6.4; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; AskTB5.5)

The files with submitted crash report ids are inside the ''submitted '' directory, from the directory you found the LastCrash.txt timestamp file.
The file names will begin with '''bp-'''
There might be more information from the crash report, but it might just tell us you are crashing the first time Firefox tries to use a font.
One thing I suppose you could do is select only those fonts you've got in Tools -> Options -> Content -> Fonts and Colors -> Advanced and then uncheck the '''Allow pages to use their own fonts''' option.
See http://support.mozilla.com/en-US/kb/Options+window+-+Content+panel#Fonts_Dialog
To be honest, I can't find anything on this Netscape Font Navigator and it sounds highly dubious.

Askcom has taken over as my browser firefox will not start, how do I get rid of askcom

firefox will not start. When I try to open firefox my computer displays askcom every time. I would like to get rid of askcom, I do not know how it got in my computer. I have tried to remove it in Win 7 programs and features but it will not go away.
My O/S is Win 7 Home addition.

''how do I get rid of ask.com''
See
:All of a sudden Ask.com showed up today as my default rather than Google. How do I get my Google back?
:'''https://support.mozilla.com/questions/868741'''
<br><small>Please mark "Solved" one answer that will best help others with a similar problem -- hope this was it.</small>
a good starting place for problems with extensions and toolbars are
:http://kb.mozillazine.org/Problematic_extensions
:http://kb.mozillazine.org/Uninstalling_toolbars

Firefox will not start, after reboot.

For a few months now Firefox will not start after I reboot my computer. In order to get it to start I click the exe then must go into task manager kill it, click the exe again, kill it again then, from there it will typically start, but sometimes it may take one or two more trys. When clicking the exe firefox will appear in the task manager under processes but will will start with ~7% CPU usage, then quickly drop to zero every time until it does actually open and start. I have ran a full system recovery and started anew after reinstalling mozilla several times failed to fix the problem. I run virus and spyware checks often and come up clean, and also run Chrome as a default browser.
== This happened ==
A few times a week
== Around the time 3.5 was released

Hello Tom.
You may be having a problem with some Firefox add-on that is hindering your Firefox's normal behavior. Have you tried disabling all add-ons (just to check), to see if Firefox goes back to normal?
Whenever you have a problem with Firefox, whatever it is, you should make sure it's not coming from one of your installed add-ons, be it an extension, a theme or a plugin. To do that easily and cleanly, run Firefox in [http://support.mozilla.com/en-US/kb/Safe+Mode safe mode] and select ''Disable all add-ons''. If the problem disappears, you know it's from an add-on. Disable them all in normal mode, and enable them one at a time until you find the source of the problem. See [http://support.mozilla.com/en-US/kb/Troubleshooting+extensions+and+themes this article] for information about troubleshooting extensions and theme. You can troubleshoot plugins the same way.
If you want support for one of your add-ons, you'll need to contact its author.

Firefox will not start and I get firefox.exe Application Error with the code 0x00000000, I've tried reloading but always get the same error message!

Firefox will not start, I've tried opening in safe mode, no joy. I get the firefox.exe application error 0x00000000
== This happened ==
Every time Firefox opened
== Possibly after a windows update ==
== User Agent ==
Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; YPC 3.2.0; .NET CLR 1.1.4322; InfoPath.1)

Do a clean reinstall and download a fresh Firefox copy from http://www.mozilla.com/firefox/all.html and save the file to the desktop.
Uninstall your current Firefox version and remove the Firefox program folder before installing that copy of the Firefox installer.
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.
See http://kb.mozillazine.org/Standard_diagnostic_-_Firefox#Clean_reinstall

After upgrading to 27, firefox will not start. Saw an error message during the upgrade process.

After upgrading to 27, firefox will not start. Saw an error message during the upgrade process but cannot remember.
Tried to run firefox.exe -P but receive error message:
XML Parsing error: undefined entity
Location: chrome://mozapps/content/profile/profileSelection.xul
Line number 18, Column 1:
<dialog
^
Running on Windows XP SP3. No problem whatsoever before upgrading to 27. Sending this from Chrome as I cannot open Firefox at all.

Thanks jschaer2000: after starting it once in safe mode, I closed Mozilla and tried several restarts in normal mode. So far, all worked:-)
Thank you very much again.
Still the automatic update process bothers me: it took me several days to discover the reason to the malfunction, since when I removed the problematic version from Add and Remove Programs, I didn't pay attention at first that it was another version, not v26 which I installed from my folder.
In addition, I like to save the installation files before I run new programs and if I didn't have v26 exe file, I couldn't have operated Mozilla at all. Not that it was fun to remove and install again each time v27 didn't react, but it was better than nothing, I still prefer Mozilla over its competition.

Firefox will not start in normal (hour glass for a second) or in safe mode (closes after choice box).

Firefox will not start in normal (hour glass for a second) or in safe mode (closes after choice box).
I tried all of the following with no success:
- uninstalling and reinstalling mozilla with no success.
- End all firefox.exe from the task manager and then open again the firefox from quick launch or desktop or program files folder.
- Change the firefox.exe name to firefox2.exe
- Start in safe mode and choose several alternatives after choice box, but nothing happen.
Please help.

What is your computer system, and what Firefox are you using?
Start your '''Computer''' in safe mode. Then start Firefox. Try '''Safe''' web sites.
'''[http://encyclopedia2.thefreedictionary.com/Linux+Safe+Mode Starting The Computer In Safe Mode;<br>Free Online Encyclopedia]'''

Firefox will not start after computer restart

Install Firefox, runs fine. Restart computer, Firefox will not start or finally when it tries to start script errors occur. If I reinstall Firefox after a computer restart, it will work fine, again when the computer is shut down the next time it is started, will not be able to use Firefox. Firefox will not start up in Firefox safe mode, will not start in windows safe mode. Not add on's, nothing added, just the Firefox installer Performed complete system restore on the computer, same problem. Windows 7 Pro. Remove Firefox from windows control panel, restart computer, install firefox, will run. turn off computer, turn on computer, firefox will not start or freezes. I am interfacing the internet via Explorer now.
I have reinstalled Firefox so it will run in order to perform the steps requested below.

Try this
*https://support.mozilla.org/en-US/kb/firefox-wont-start-find-solutions
Open TaskManager, if it running '''firefox.exe''' > end all processes
Sometimes a problem with Firefox may be a result of malware installed on your computer, that you may not be aware of.
You can try these free programs to scan for malware, which work with your existing antivirus software:
* [http://www.microsoft.com/security/scanner/default.aspx Microsoft Safety Scanner]
* [http://www.malwarebytes.org/products/malwarebytes_free/ MalwareBytes' Anti-Malware]
* [http://support.kaspersky.com/faq/?qid=208283363 TDSSKiller - AntiRootkit Utility]
* [http://www.surfright.nl/en/hitmanpro/ Hitman Pro]
* [http://www.eset.com/us/online-scanner/ ESET Online Scanner]
[http://windows.microsoft.com/MSE Microsoft Security Essentials] is a good permanent antivirus for Windows 7/Vista/XP if you don't already have one.
Further information can be found in the [[Troubleshoot Firefox issues caused by malware]] article.
Did this fix your problems? Please report back to us!

Firefox will not start up at all due to installing add on {e4a8a97b-f2ed-450b-b12d-ee082ba24781}

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