Cannot uninstall because I get a message to close Firefox first, but it is not open

Firefox stopped working, I tried to uninstall it and because I thought something was corrupted. It will not let me unistall because I am told to close Firefox first. I cannot find firefox, nor can I close it. I think that it is gone, but it still appears in the list of programs. How do I get rid of it and start again with a fresh version?
== About a week ago, but when I tried to Open firefox ==
== 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; .NET CLR 1.1.4322; .NET CLR 3.0.30618; InfoPath.2; Media Center PC 5.0; SLCC1; Windows-Media-Player/10.00.00.3990; Tablet PC 2.0; yie8)

You need to quit the Safari process, not just close the Safari window.

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I can not download the new version of Firefox. I keep getting a message that says "Firefox 5.0.1dmg could not be opened, because an unknown error occurred" HOW do I fix this?

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If you have problems with updating or with the permissions then easiest is to download the full version and trash the currently installed version to do a clean install of the new version.
Download a new copy of the Firefox program and save the DMG file to the desktop
* Firefox 5.0.x: http://www.mozilla.com/en-US/firefox/all.html
* Trash the current Firefox application to do a clean (re-)install
* Install the new version that you have downloaded
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* http://kb.mozillazine.org/Profile_folder_-_Firefox

Cannot install Photoshop or Bridge from CC. Get message 'close bridge.exe', but it is not open.

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When I close Firefox and then come back to it layer a box comes up that says it's already running. It ays to close Firefox first but when I hit close nothing happens and the box comes up again. I have to shut down my computer and restart to get into Firef

When I close Firefox and then come back to it later a box comes up that says it's already running. It says to close Firefox first but when I hit close nothing happens and the box comes up again. I have to shut down my computer and restart to get into Firefox again. If I can't get this fixed I will start using someone else. Someone told me a way to close Firefox but I forgot what they said.
== This happened ==
Every time Firefox opened
== a couple of months ago

Hello Brian.
You don't need to restart your computer to open Firefox again: you just need to close it manually through your application manager (CTRL+SHIFT+ESC in Processes tab). Anyway, hopefully this support article is what you need:
http://support.mozilla.com/en-US/kb/Firefox+hangs
What's probably happening is that 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.

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I'm using Chrome because the only way to run firefox (without a forced shutdown) is to copy the Firefox app to another name and run that. BTW, I've also deleted all the parentlock files from my system (several times). If this cannot be solved I'll have to switch to Chrome (as much as I hate Google)!
Versions: Firefox 37.0.2 OS/X: 10.10.2 (14C1514)

Installed plugins
Find updates for installed plugins at mozilla.com/plugincheck
OpenH264 Video Codec provided by Cisco Systems, Inc.
File: 1.3
Path: /Users/Mark.Rafferty/Library/Application Support/Firefox/Profiles/9zc0lkqh.default/gmp-gmpopenh264/1.3
Version: 1.3
State: Enabled
Play back web video and use video chats.
MIME Type Description Suffixes
iPhotoPhotocast
File: iPhotoPhotocast.plugin
Path: /Library/Internet Plug-Ins/iPhotoPhotocast.plugin
Version: 7.0
State: Enabled
iPhoto6
MIME Type Description Suffixes
application/photo iPhoto 700
Google Earth Plug-in
File: Google Earth Web Plug-in.plugin
Path: /Library/Internet Plug-Ins/Google Earth Web Plug-in.plugin
Version: 5.2
State: Enabled
The Google Earth Plugin allows you to view 3D imagery and terrain in your web browser.
MIME Type Description Suffixes
application/geplugin Google Earth browser plugin
RealPlayer Plugin.plugin
File: RealPlayer Plugin.plugin
Path: /Applications/RealPlayer.app/Contents/MacOS/RealPlayer Plugin.plugin
Version: 0.0.1d1
State: Enabled
RealPlayer Plugin
MIME Type Description Suffixes
audio/x-pn-realaudio-plugin RealMedia rm
audio/x-pn-realaudio RealPlayer Metafile ram
Google Talk Plugin Video Accelerator
File: npgtpo3dautoplugin.plugin
Path: /Library/Internet Plug-Ins/npgtpo3dautoplugin.plugin
Version: 0.1.43.3
State: Enabled
Google Talk Plugin Video Accelerator version:0.1.43.3
MIME Type Description Suffixes
application/vnd.gtpo3d.auto Google Talk Plugin Video Accelerator Type
Google Talk NPAPI Plugin
File: googletalkbrowserplugin.plugin
Path: /Library/Internet Plug-Ins/googletalkbrowserplugin.plugin
Version: 1.4.3.10298
State: Enabled
Version 1.4.3.10298
MIME Type Description Suffixes
application/googletalk Google voice and video chat googletalk
Microsoft Office Live Plug-in
File: OfficeLiveBrowserPlugin.plugin
Path: /Library/Internet Plug-Ins/OfficeLiveBrowserPlugin.plugin
Version: 12.2.9
State: Enabled
Office Live Update v1.0
MIME Type Description Suffixes
application/officelive Office Live Update v1.0
Flip4Mac Windows Media Plugin
File: Flip4Mac WMV Plugin.plugin
Path: /Library/Internet Plug-Ins/Flip4Mac WMV Plugin.plugin
Version: 2.5.0.1
State: Enabled
The Flip4Mac WMV Plugin allows you to view Windows Media content using QuickTime.
MIME Type Description Suffixes
video/x-ms-asf Windows Media Video asf
video/x-ms-asx Windows Media Playlist asx
audio/x-ms-wax Windows Media Playlist wax
application/x-ms-wmp Windows Media Plugin
video/x-ms-wmp Windows Media Video wmp
application/x-mplayer2 Windows Media Plugin
video/x-ms-wmx Windows Media Playlist wmx
video/x-ms-wm Windows Media Video wm
video/x-ms-wvx Windows Media Playlist wvx
video/x-ms-wmv Windows Media Video wmv
video/x-ms-asf-plugin Windows Media Plugin
audio/x-ms-wma Windows Media Audio wma
application/asx Windows Media Plugin
LogMeIn Plugin 1.0.0.935
File: LogMeIn.plugin
Path: /Library/Internet Plug-Ins/LogMeIn.plugin
Version: 1.0.935
State: Enabled
LogMeIn remote control components
MIME Type Description Suffixes
application/x-3amlabs-rafiletransfer File Transfer
application/x-3amlabs-raversion Version
application/x-3amlabs-raremotecontrol Remote Control
application/x-3amlabs-raperfview Performance Viewer
Java Applet Plug-in
File: JavaAppletPlugin.plugin
Path: /Library/Internet Plug-Ins/JavaAppletPlugin.plugin
Version: Java 7 Update 51
State: Enabled
Displays Java applet content, or a placeholder if Java is not installed.
MIME Type Description Suffixes
application/x-java-applet;version=1.4 Java applet
application/x-java-applet;version=1.2.1 Java applet
application/x-java-applet;javafx=2.2.51 Java applet
application/x-java-applet;version=1.2.2 Java applet
application/x-java-applet;version=1.3 Java applet
application/x-java-vm Java applet
application/x-java-applet;deploy=10.51.2 Java applet
application/x-java-applet;version=1.1.1 Java applet
application/x-java-vm-npruntime Java applet
application/x-java-applet;version=1.2 Java applet
application/x-java-applet;version=1.7 Java applet
application/x-java-applet;version=1.4.1 Java applet
application/x-java-applet;version=1.1.2 Java applet
application/x-java-applet Basic Java Applets javaapplet
application/x-java-applet;version=1.1 Java applet
application/x-java-applet;version=1.1.3 Java applet
application/x-java-applet;version=1.6 Java applet
application/x-java-applet;version=1.4.2 Java applet
application/x-java-applet;version=1.3.1 Java applet
application/x-java-applet;version=1.5 Java applet
application/x-java-applet;jpi-version=1.7.0_51 Java applet
Silverlight Plug-In
File: Silverlight.plugin
Path: /Library/Internet Plug-Ins/Silverlight.plugin
Version: 5.1.30317.0
State: Enabled
5.1.30317.0
MIME Type Description Suffixes
application/x-silverlight Microsoft Silverlight xaml
application/x-silverlight-2 Microsoft Silverlight xaml
QuickTime Plug-in 7.7.3
File: QuickTime Plugin.plugin
Path: /Library/Internet Plug-Ins/QuickTime Plugin.plugin
Version: 7.7.3
State: Enabled
The QuickTime Plugin allows you to view a wide variety of multimedia content in web pages. For more information, visit the QuickTime Web site.
MIME Type Description Suffixes
video/x-msvideo Video For Windows avi,vfw
audio/mp3 MP3 audio mp3,swa
audio/mpeg3 MP3 audio mp3,swa
video/3gpp2 3GPP2 media 3g2,3gp2
audio/x-caf CAF audio caf
audio/mpeg MPEG audio mpeg,mpg,m1s,m1a,mp2,mpm,mpa,m2a,mp3,swa
video/quicktime QuickTime Movie mov,qt,mqv
audio/x-mpeg3 MP3 audio mp3,swa
video/mp4 MPEG-4 media mp4
application/x-sdp SDP stream descriptor sdp
audio/wav WAVE audio wav,bwf
video/avi Video For Windows avi,vfw
audio/mp4 MPEG-4 media mp4
video/x-m4v Video m4v
audio/x-wav WAVE audio wav,bwf
application/sdp SDP stream descriptor sdp
audio/x-aiff AIFF audio aiff,aif,aifc,cdda
video/x-mpeg MPEG media mpeg,mpg,m1s,m1v,m1a,m75,m15,mp2,mpm,mpv,mpa
video/3gpp 3GPP media 3gp,3gpp
video/msvideo Video For Windows avi,vfw
audio/x-mpeg MPEG audio mpeg,mpg,m1s,m1a,mp2,mpm,mpa,m2a,mp3,swa
audio/vnd.qcelp QUALCOMM PureVoice audio qcp
audio/x-mp3 MP3 audio mp3,swa
application/x-rtsp RTSP stream descriptor rtsp,rts
audio/amr AMR audio AMR
video/sd-video SD video sdv
audio/aiff AIFF audio aiff,aif,aifc,cdda
video/mpeg MPEG media mpeg,mpg,m1s,m1v,m1a,m75,m15,mp2,mpm,mpv,mpa
audio/3gpp2 3GPP2 media 3g2,3gp2
audio/aac AAC audio aac,adts
audio/x-m4b AAC audio book m4b
audio/x-m4p AAC audio m4p
audio/x-gsm GSM audio gsm
application/x-mpeg AMC media amc
audio/x-aac AAC audio aac,adts
audio/basic uLaw/AU audio au,snd,ulw
audio/x-m4a AAC audio m4a
audio/3gpp 3GPP media 3gp,3gpp
Default Browser Helper
File: Default Browser.plugin
Path: /Library/Internet Plug-Ins/Default Browser.plugin
Version: 600
State: Enabled
Provides information about the default web browser
MIME Type Description Suffixes
application/apple-default-browser Provides information about the default web browser
SharePoint Browser Plug-in
File: SharePointBrowserPlugin.plugin
Path: /Library/Internet Plug-Ins/SharePointBrowserPlugin.plugin
Version: 14.4.8
State: Enabled
Microsoft Office for Mac SharePoint Browser Plug-in
MIME Type Description Suffixes
application/x-sharepoint Microsoft Office for Mac SharePoint Browser Plug-in
application/x-sharepoint-protocolhandler Microsoft Office for Mac Protocol Handler
Shockwave Flash
File: Flash Player.plugin
Path: /Library/Internet Plug-Ins/Flash Player.plugin
Version: 17.0.0.169
State: Enabled
Shockwave Flash 17.0 r0
MIME Type Description Suffixes
application/x-shockwave-flash Shockwave Flash swf
application/futuresplash FutureSplash Player spl
Picasa
File: Picasa.plugin
Path: /Users/Mark.Rafferty/Library/Internet Plug-Ins/Picasa.plugin
Version: 1.0
State: Enabled
Picasa plugin.
MIME Type Description Suffixes
application/x-picasa-detect 3.1 picasa
WebEx64 General Plugin Container
File: WebEx64.plugin
Path: /Users/Mark.Rafferty/Library/Internet Plug-Ins/WebEx64.plugin
Version: 1.0
State: Enabled
WebEx64 General Plugin Container Version 205
MIME Type Description Suffixes
application/webx-gpc-plugin64 gpc

I installed Firefox today but it will not open and the icon on the taskbar will not close and I cannot uninstall it and the helper app does not work either?

I have tried everything that I know to uninstall the new version of Firefox. I also installed Aurora beta and it had the same behavior and I was able to uninstall that. I cannot open a ff browser to work on it using much of your support information. I click on icon but it does not start on the desktop but task manager shows it as running. I have to end task in task manager to close it. I can't uninstall it and have tried system restore but that also doesn't work because of another issue with my antivirus program.

If this is on a Windows computer, check this Microsoft link;
'''''[http://support.microsoft.com/mats/Program_Install_and_Uninstall Fix problems that programs cannot be installed or uninstalled]'''''

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See:
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See if you can Force Quit things holding CMD+Option+esc keys.

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in some cases this error at startup might also be a symptom of malware active on the pc. please do a full scan of your system with your security software already in place and/or an alternative like the [http://www.malwarebytes.org/products/malwarebytes_free/ free version of malwarebytes].

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Cannot uninstall because I get a message to close Firefox first, but it is not open

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