My profile is missing so Firefox won't open at all. How do I reset it then?

I had been using Firefox for a while off and on, but was using a different browser as my main one. Now that that browser is outdated and there's no update available, I wanted to switch to Firefox permanently. Since all of my bookmarks are only updated on my old browser, I thought it would be much easier to just uninstall and reinstall Firefox and automatically carry over my bookmarks (since it did that the first time a while ago). While looking up how to install it, I came across something that said the bookmarks are stored in a "profile" which needed to be deleted in order to be reset. I followed the instructions to delete my profile, and then uninstalled and reinstalled Firefox.
NOW, I go to open my newly installed Firefox and a window comes up that says: "Your Firefox profile can't be loaded. It may be missing or inaccessible." ...Well, I wanted to start over completely, so of course I don't have a profile anymore. But my only option now is to click out of that window, and Firefox just disappears. No way to access anything on Firefox, no options, no anything so all of the so called "solutions" I've seen (IE: resetting the profile... I can't do that either!) are impossible for me to do.
All I wanted to do was start over completely with Firefox which seemed like a very simple solution and has now turned into a hassle and an unusable browser. How can I reset or create a new profile without being IN Firefox to do it? Was deleting my profile a mistake? If so, your help page is very misleading!
Someone please help. I really don't want to use ANOTHER browser.
Thank you!!

I'm having the same problem as the OP, I can't find that file "profiles.ini"
can't re-install firefox, deleted all files related to Mozilla and Firefox, still locked out by missing Firefox profile
I posted on my own problem recently w/ no response (https://support.mozilla.org/en-US/search?a=1&asked_by=GPStyne&w=2),
so far all posts on this support page have been confusing and I've been unable to find any of the things they spoke of trying to change it.
at this point I'm begrudgingly running Safari hoping someone can help me fix this, can't believe i can't just delete all and reinstall like a normal program/app

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Help please?

But I can't... find... it... It's not there.
Unless you're talking about the entire Mozilla Firefox folder (which isn't what the thing you copied says,) there is no installation folder.

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I hope someone can help. My husband did something to update Firefox (or Firefox just automatically updated today, I don't know which), but I didn't like the new toolbar much, so I did a System Restore to get back the old one. That didn't work, so I then did another System Restore for an earlier day, but when I restarted the computer, Firefox wouldn't open at all.
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That's what happened to me too after I upgraded to firefox 4 and it wouldn't connect to my internet. Now I'm stuck with Internet Explorer with none of my important personal information like my favorites.

Firefox won't open at all since May 4 update, yet no error message appears. Am not savvy/brave enough to test for corrupt Profile data. HELP, PLEASE!

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Thanks again!

Firefix has stopped opening on my mac, it sais that my profile is missing and it won't open. any help?

Firefox is refusing to open, every time i try it a window pops up saying that my profile is missing. anybody got any ideas at all?

Is there still a profile folder present in /Users/<user>/Library/Application Support/Firefox/Profiles/<profile>/ ?
Be aware that in Lion the $HOME/Library is now a hidden folder.
Open Finder and use one of these:
* Go > Go To Folder (Shift-Command-G) and in the dialog type: ~/Library
* Open the "Go" menu and hold down the Option key to make the Library appear
* http://kb2.adobe.com/cps/909/cpsid_90947.html Access hidden user library files

Firefox won't open; tried all I found on this site; can't get in to disable add-ons.

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You can use one of these to start Firefox in Safe Mode:
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*On Mac, hold down the Options key while starting Firefox
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*https://support.mozilla.org/kb/Safe+Mode
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Do a clean reinstall and delete the Firefox program folder before (re)installing a fresh copy of the current Firefox release.
Download a fresh Firefox copy and save the file to the desktop.
*Firefox 22.0: http://www.mozilla.org/en-US/firefox/all.html
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Remove the Firefox program folder before installing that newly downloaded copy of the Firefox installer.
*(32 bit Windows) "C:\Program Files\Mozilla Firefox\"
*(64 bit Windows) "C:\Program Files (x86)\Mozilla Firefox\"
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*http://kb.mozillazine.org/Uninstalling_Firefox
Your bookmarks and other personal data are stored in the Firefox profile folder and won't be affected by an uninstall and (re)install, but make sure that "remove personal data" is NOT selected when you uninstall Firefox.
If you keep having problems then also create a new profile.
*http://kb.mozillazine.org/Profile_folder_-_Firefox
*http://kb.mozillazine.org/Profile_backup
*http://kb.mozillazine.org/Standard_diagnostic_-_Firefox#Clean_reinstall
Do a malware check with some malware scanning programs on the Windows computer. 
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Make sure that you update each program to get the latest version of their databases before doing a scan.
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*SuperAntispyware: http://www.superantispyware.com/
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This is a translation of the text as my user language is finnish.
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Firefox won't open at all

Firefox ia not working, it will not open at all, although it is showing up on the bottom bar as if it IS open. I have tried un-installing and updating it but it is still happening.

Hi jules78,
There is a [https://support.mozilla.org/en-US/kb/Firefox-not-start Knowledge Base article] that covers this topic. It might be useful.
Have you tried starting Firefox in Safe Mode? Hold down "shift" while Firefox is starting up. If the crash doesn't happen in Safe Mode, you should read [[Troubleshooting extensions and themes]].
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Firefox won't open at all. None of the troubleshooting suggestions work

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you...tried the flash player fix you included, no dice. thx though
plugin-ins
Adobe Acobat 11.0.0.29 ''ask to activate''
Java Platform SE 8 U25 11.25.2.18 ''ask to activate''
Java Deployment Toolkit 8.0250.18 11.25.2.18 ''ask to activate''
Nero Kwik Media Helper 1.1.2.0 ''ask to activate''
Nvidia 3d Vision 7.17.13.4448 ''ask to activate''
Nvidia 3d Vision (streaming plugin) 7.17.13.4448 ''ask to activate''
OpenH264 video codec by Cisco 1.1 ''ask to activate''
Shockwave Flash 15.0.0.189 ''always activate''
Silverlight Plug-in 5.1.30514.0 ''ask to activate''
Unity Player ''ask to activate''
Extentions
Norton Toolbar 2014.7.9.8 Disabled
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OS Name Microsoft Windows 7 Ultimate
Version 6.1.7601 Service Pack 1 Build 7601
Other OS Description Not Available
OS Manufacturer Microsoft Corporation
System Name xxxxx
System Manufacturer System manufacturer
System Model System Product Name
System Type x64-based PC
Processor Intel(R) Core(TM) i7-3930K CPU @ 3.20GHz, 3200 Mhz, 6 Core(s), 12 Logical Processor(s)
BIOS Version/Date American Megatrends Inc. 2003, 6/29/2012
SMBIOS Version 2.7
Windows Directory C:\Windows
System Directory C:\Windows\system32
Boot Device \Device\HarddiskVolume2
Locale United States
Hardware Abstraction Layer Version = "6.1.7601.17514"
User Name XXXXXXX
Time Zone Hawaiian Standard Time
Installed Physical Memory (RAM) 16.0 GB
Total Physical Memory 15.9 GB
Available Physical Memory 11.8 GB
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Can't open firefox, get error message: The instruction at "0x00000000" referenced memory at "0x00000000". The memory could not be read". Firefox won't open at all, not in safe mode or anything. Tried uninstalling and reinstalling, no good, tried creating

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Every time Firefox opened
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#is a way of protecting the '''''Windows environment'''''
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# should '''''never be used in place of un-installing an application and trying to replace it with an earlier version of that same application'''''
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Unfortunately, Mac OS 10.4 does not support Firefox 4...see [http://kb.mozillazine.org/Installing_Firefox Installing Firefox]. I would recommend you uninstall, and then reinstall the latest build of [http://www.mozilla.com/en-US/firefox/all-older Firefox 3.6].
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'''''Users are overusing and misusing System Restore!'''''
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#is a way of protecting the '''''Windows environment'''''
#'''''may help to avoid a complete reinstall of the Windows Operating System'''''.
# should '''''never be used in place of un-installing an application and trying to replace it with an earlier version of that same application'''''
#'''''should generally be the LAST step in diagnosing/reversing a problem with the operation of Windows, BEFORE performing a complete reinstall of the Windows Operating System'''''
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I downloaded the latest version and now firefox won't open at all on my mac laptop

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Hello, discodiva64
Thank you for the question. Try uninstalling all components of iTunes in the order specified of the article below. Once this is done attempt to install iTunes again.
Removing and Reinstalling iTunes and other software components for Windows XP
http://support.apple.com/kb/ht1925
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"The feature you are trying to use is on a network resource that is unavailable" alert when removing Apple software in Windows
http://support.apple.com/kb/TS3704
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Firefox won't open, says profile may be missing or inaccessable, help pages not helpful

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My profile is missing so Firefox won't open at all. How do I reset it then?

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