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.

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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.
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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.

After Upgrading to new version Firefox will not open at all

I am running Windows 7 - 64 bit version. Firefox prompted me to upgrade to the new version, which I did. It downloaded straightaway but after I installed it the programme does not appear on screen at all. This hapenned several weeks ago so I uninstalled it and went back to an earlier version. Now I cannot work out how to do this again, so I am stuck without Firefox altogether.

I would be interested if you or someone else can tell me what the '''IEMB3''' in your User Agent string is.
If you get to the stage where Fx 6 seems to be installed, try starting it in Firefox Safe Mode - hold down the Shift Key as you double click on the Firefox icon>ignore the page that opens>Continue. If the browser opens O.K. you need to do some Troubleshooting - in Default theme -
https://support.mozilla.com/en-US/kb/Troubleshooting%20extensions%20and%20themes

After a service provider crash, Firefox will not start.

When trying to launch Firefox, I get an error message that Firefox creashed. I have two options, restart Firefox or Quit Firefox. Neither option works, Keeps kicking me back to the error message

i decided to uninstall and reinstall Firefox. Didn't know if I would lose passwords or favorites. But it worked and I didn't lose any of may info.

Tried to install ff4 got message "your computer must be restarted to complete a previous upgrade of firefox. do you want to reboot now" I rebooted computer now firefox will not start at all and i have tried to uninstall and get the same message

have also tried to reinstall older version of firefox and get same message

i have been trying to figure out how to fix this same issue as well for the past 2 hours or so. it is very upsetting that you can't even uninstall it try to redo it all or just use the old version. everything seemed to be ok untill i got to the set up part of the process that is when i kept getting the same message: ''your computer must be restarted to complete a previous upgrade of firefox. do you want to reboot now" and to no avail. please help. i really enjoyed my firefox/mozilla. now i can't even use it i have to go back to internet explorer for now...........

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 after I downloaded the newest version

Firefox used to work on my computer but will not start now that I have downloaded the newest version.

See [[Firefox will not start]]
If you issue is resolved by this post please click Solved it! so we can assist others.

Firefox will not open at all. I tried to remove it from the programs to try to reinstall it but it wont let me remove it. So I tried to download again anyways and ff still wont open. My email is alicia@*****

Firefox will not open at all. I tried to remove it from the programs to try to reinstall it but it wont let me remove it. So I tried to download again anyways and ff still wont open. My email is alicia@****

Did you check your security software (firewall)?
A possible cause is security software (firewall) that blocks or restricts Firefox without informing you about that, possibly after detecting changes (update) to the Firefox program.
Remove all rules for Firefox from the permissions list in the firewall and let your firewall ask again for permission to get full unrestricted access to internet for Firefox and the plugin-container process.
See [[Server not found]] and [[Firewalls]] and http://kb.mozillazine.org/Firewalls
If necessary then also see:
* http://kb.mozillazine.org/Browser_will_not_start_up
* http://kb.mozillazine.org/Error_loading_websites

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.

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.

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.

After installing Maverick, my downloaded movies will not play in Quick Time. It gives me the following error "You can't open the application "QuickTime Player.app" because it may be damaged or incomplete." What can I do?

After installing Maverick, my downloaded movies will not play in Quick Time. I receive the following error message:
You can’t open the application “QuickTime Player.app” because it may be damaged or incomplete. So I tried to unistall QT and I get an error that says, You can not delete this application as it is a requirement for the OSX.
Well I did find a way to delete it, by going into the various components and one by one deleting it. Now I reinstall it and the message is that this Quick Time is for an earlier version before Maverick 7. SMH....Now what.?

Hello, terrygav.
I would recommend processing a reinstall of Mavericks.
OS X Mavericks: Reinstall OS X
http://support.apple.com/kb/PH13871
Make sure to backup all of your data prior to reinstalling OS X 10.9.
Back up your Mac
http://support.apple.com/kb/PH11371
Cheers,
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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]'''

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

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