Starting Firefox in Private mode from the pinned ico in taskbar causes Windows Explorer to crash.

Starting Firefox in Private mode from the pinned icon in taskbar (right click, choose "New Private Window") causes Windows Explorer to crash almost everytime, but not always. Very odd.
Didn´t happen with previous versions of Firefox.
Firefox 22.0, Win 7 Ultimate with all updates applied.

Hello Paul,
That's a very odd behavior indeed. All I can think of is that an add-on is confused and makes Firefox crash. The Reset Firefox feature can fix many issues by restoring Firefox to its factory default state while saving your essential information. Note: ''This will cause you to lose any Extensions, Open websites, and some Preferences.''
To Reset Firefox do the following:
#Go to Firefox > Help > Troubleshooting Information.
#Click the "Reset Firefox" button.
#Firefox will close and reset. After Firefox is done, it will show a window with the information that is imported. Click Finish.
#Firefox will open with all factory defaults applied.
Further information can be found in the [[Reset Firefox – easily fix most problems]] article.
Did this fix your problems? Please report back to us!
Thank you.

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How to start firefox in safe mode from the command line

This is for Window XP, firefox 19

Hello jjfirefox77
"C:\Program Files\Mozilla Firefox\firefox.exe" -safe-mode
thank you

Is there some sort of bug where app tabs don't work with private browsing? My pinned tabs don't show when I start Firefox in private mode.

I recently updated to Firefox 5.0, and I was pretty impressed with the app tabs. I usually use Firefox in private browsing mode, but recently I changed that to make use of the history function. However, I decided to change it back to permanent private browsing, and apparently my pinned tabs all just disappeared. Is there anyway I can change this?

App (pinned) tabs and Tab Groups (Panorama) are stored as part of the session data in the file sessionstore.js in the Firefox profile folder. 
If you use Private Browsing mode then no session data is stored to disk.

How to enable private mode from commandline, with an URL. I am a software dev and I wish to have my application open links in Firefox. Using ShellExecute(), i c

How to enable private mode from commandline, with an URL.
I am a software dev and I wish to have my application open links in Firefox.
Using ShellExecute(), i can do with with commandlines like:
firefox.exe http://support.mozilla.org
But I also want the option to open the link in private mode.
I am able to start firefox in private mode by doing this:
firefox.exe -private
However, if I add a link to the command line
firefox.exe -private http://support.mozilla.org
I get strange results.
If firefox is not running, it launches 2 copies of the application.
One that opens in private mode and the other opens in normal mode and goes to the URL specified.
If firefox is already running, it just opens the URL in a new tab.
No private mode instance is launched.
Am I using the command-line syntax incorrectly?

It will never work if Firefox is already running as Firefox will use the already opened Firefox instance. 
In that case only using a separate profile will work.
You can try to specify the -url switch as well.
*firefox.exe -private -url http://support.mozilla.org
You can also look at the -new-tab switch.
*firefox.exe -private -new-tab http://support.mozilla.org
*https://developer.mozilla.org/en/Command_Line_Options

FF4 final release: Click the Firefox menu, then choose "Start Private Browsing." Once in private mode, click the Firefox menu again and instead of displaying "Stop Private Browsing" it still displays "Start Private Browsing."

I think this is a regression as I'm pretty sure it was correct in previous beta versions.

Seems to be working fine here.
Start Firefox in [[Safe Mode]] to check if one of the add-ons is causing the problem (switch to the DEFAULT theme: Tools > Add-ons > Themes).
* Don't make any changes on the Safe mode start window.
See:
* [[Troubleshooting extensions and themes]]
Create a new profile exclusively for the Firefox 4 version and create a desktop shortcut with -P "profile" appended to the target to launch that profile.
* http://kb.mozillazine.org/Testing_pre-release_versions
* http://kb.mozillazine.org/Creating_a_new_Firefox_profile_on_Windows
* http://kb.mozillazine.org/Shortcut_to_a_specific_profile
* http://kb.mozillazine.org/Using_multiple_profiles_-_Firefox

Is there a way to change the hotkey for starting firefox in safe-mode?

The current default hotkey is shift. Holding it when starting firefox will start it in safe mode (true story). My super duper favorite handy windows hotkey for starting programs pinned to the task bar in windows 7 is windows_key + shift + #, and that conflicts with the firefox setting, and i always end up starting firefox in safe mode because im that lazy.

Greetings!
I'm an irssi user, and I have awesome mouse gesture addon for it, and I'm afraid I can't live without it anymore.. But it requires Shift key for opening links, therefore Firefox, as my default browser, always starts in Safe mode :(
I'm not a programmer, easiest workaround would be modifying the irssi addon, but I suck on that, too.
If there's a way to bypass Safe Mode in Firefox, or at least a way to change the Shift key to something else, that would make my miserable life a tad easier.

Your site recommended that I start Firefox in "safe mode," but despite following the steps, I could not do so, why?

I have used Firefox as my browser for more than seven years, maybe ten.
After the two recent "updates" over the last six weeks or two months, Firefox has been horrible.
It constantly hangs and crashes, cannot access certain basic website, slows start-up, use, and shutdown, and, according to AVG, is using massive memory. Two weeks ago, AVG actually came out and directly recommended that Firefox be completely disabled.
I tried the Firefox recommendation to reset Firefox to default settings. It didn't work.
I tried the Firefox recommendation to start Firefox in "safe mode." But despite following their instructions as to how to do so, I could not start Firefox in safe mode; it just bounced back to the recommendation page.
It seems that Firefox has destroyed itself, and made itself completely unusable as a browser.
At this point, I see little alternative to removing Firefox completely from my computer and changing to Internet Explorer as my browser.
Has anyone had a similar experience, and similar problems, or does anyone have any ideas as to how I can try to salvage Firefox and restore it as a usable browser? Thanks to all who have any comments or ideas.

Please update to the current Firefox 33.1.1 release.
*Help > About Firefox
*https://support.mozilla.org/kb/update-firefox-latest-version.
*https://support.mozilla.org/kb/Updating+Firefox
The Firefox version that you currently run is no longer supported with security updates.
*It is important to update Firefox and add-ons to the latest version to get all security fixes.
You can try to disable OMTC and leave hardware acceleration in Firefox enabled.
*about:config page: layers.offmainthreadcomposition.enabled = false
You can open the about:config page via the location/address bar.
You can accept the warning and click "I'll be careful" to continue.
*http://kb.mozillazine.org/about:config
You can check if you can start Firefox in [[Safe Mode|Safe Mode]] by holding down the Shift/Options key.
Start Firefox in [[Safe Mode|Safe Mode]] to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem.
*Switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance
*Do NOT click the Reset button on the Safe Mode start window
*https://support.mozilla.org/kb/Safe+Mode
*https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes

Had to start Firefox in safe mode cause it kept crashing after i deleted the file. Now Fire fox Crashes every time I open it and I have to put it in safe mode j

Had to start Firefox in safe mode cause it kept crashing after i deleted the file. Now Fire fox Crashes every time I open it and I have to put it in safe mode just to use it, also it's not syncing with my iPad.

If you use Norton software, try disabling your Norton extensions. As of last week, there were severe compatibility issues with Firefox 24.

Firefox will not start and open a website from a Thunderbird email link. It will go to a link from Thunderbird once Firefox is open, but will not initially start Firefox and proceed to open the Thunderbird email link.

Firefox will not ''start'' and open a website from a Thunderbird email link. A link from Thunderbird will open once Firefox is ''already'' started, but will not initially start Firefox and proceed to open the Thunderbird email link.

I also have this problem. I cannot open links from a discussion board I frequent nor can I open links from my email. Also after opening my email, I cannot go to any other sites except my home page. I can then go no where else.
When I close Firefox and try to reopen it, it does nothing! I have to bring up the Task Manager and end the Firefox process before I can get back in.
To the best of my knowledge, this problem started with the new update to Ver. 3.6.9. I am running Windows XP Media Center 2005

How do I start firefox in safe mode on a Mac as the equivalent of holding option key whilst starting doesn't open dialogue on Mac?

I am trying to reset toolbars and am following firefox's help instructions. How do I start firefox in safe mode on a Mac as the equivalent of holding option key whilst starting doesn't open a dialogue box on the Mac?

Thanks Morbus.. I hadn't noticed that but it was already set at Mac. I tried it again and it worked this time... but alas my main problem persists:
My back and forward buttons don't work in Firefox and I've lost all of my bookmarks! I've tried a few of the suggestions but without success at the moment.
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Because you this loading firefox.exe like process from the beginning of the computer with a load from 38 to 42000 kb or like I can solve this problem

because you this loading firefox.exe like process from the beginning of the computer with a load from 38 to 42000 kb or like I can solve this problem, atualmente when lighting the computer among the processes that are loaded when beginning the computer is a process of name firefox.exe with a load of between 30 and 50000 kb but I don't find to the registered firefox inside the programs to crgar from the beginning when entering for msconfig.exe my operating system is so far windows xp up-to-date sp3 and my firefox is 7.0.1 version in Spanish that is my native language.

That seems very suspicious. Two suggestions.
First, try Firefox's Safe Mode. This will let you work around problems with add-ons and perhaps help you identify things to remove so that Firefox goes back to normal.
I recommend making a backup of your Firefox settings before starting in Safe Mode. To back up Firefox, see [https://support.mozilla.com/en-US/kb/Backing+up+your+information Backing up your information].
Next, try starting Firefox in Firefox
[http://support.mozilla.com/kb/Safe+Mode Safe Mode]. Be careful not to "reset" anything permanently if you didn't back up.
Does that work? If so, you may need to disable your add-ons and just bring the most essential ones back to life until you discover the problem one.
Second thought: malware. You could supplement your usual security scans with these:
Malwarebytes Anti-malware : http://www.malwarebytes.org/mbam.php
SUPERAntiSpyware : http://www.superantispyware.com/
HouseCall : http://housecall.trendmicro.com/
Hope this helps.

Firefox immediately upon starting firefox it minimizes itself to the tool bar and will not maximize

Locking duplicate thread. Please continue here: [[/questions/1038747]]
When starting Firefox either from the program menu or the toolbar, firefox loads in the minimized location on the tool bar. Firefox appears to correctly load the web site but I have not been able to maximize firefox. How do I get firefox to maximize?

Hello,
'''Try Firefox Safe Mode''' to see if the problem goes away. [[Troubleshoot Firefox issues using Safe Mode|Firefox Safe Mode]] is a troubleshooting mode that temporarily turns off hardware acceleration, resets some settings, and disables add-ons (extensions and themes).
If Firefox is open, you can restart in Firefox Safe Mode from the Help menu:
*In Firefox 29.0 and above, click the menu button [[Image:New Fx Menu]], click Help [[Image:Help-29]] and select ''Restart with Add-ons Disabled''.
*In previous Firefox versions, click on the Firefox button at the top left of the Firefox window and click on ''Help'' (or click on ''Help'' in the Menu bar, if you don't have a Firefox button) then click on ''Restart with Add-ons Disabled''.
If Firefox is not running, you can start Firefox in Safe Mode as follows:
* On Windows: Hold the '''Shift''' key when you open the Firefox desktop or Start menu shortcut.
* On Mac: Hold the '''option''' key while starting Firefox.
* On Linux: Quit Firefox, go to your Terminal and run ''firefox -safe-mode'' (you may need to specify the Firefox installation path e.g. /usr/lib/firefox)
When the Firefox Safe Mode window appears, select "Start in Safe Mode".
:[[Image:Safe Mode Fx 15 - Win]]
'''''If the issue is not present in Firefox Safe Mode''''', your problem is probably caused by an extension, theme, or hardware acceleration. Please follow the steps in the [[Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems]] article to find the cause.
''To exit Firefox Safe Mode, just close Firefox and wait a few seconds before opening Firefox for normal use again.''
When you figure out what's causing your issues, please let us know. It might help others with the same problem.

When trying to start firefox a message comes up " the procedure entry point IS Thread Desktop composited could not be located in the dynamic link library user32.dll" I then tell it okay as this is the only button it has abd it then takes me into the Add-o

When trying to start firefox a message comes up " the procedure entry point IS Thread Desktop composited could not be located in the dynamic link library user32.dll" I then tell it okay as this is the only button it has abd it then takes me into the Add-on window and freezes up and I then have to reboot and avoid using firefox
== This happened ==
Every time Firefox opened
== After trying to install Firefox upgrade and IE8 ==
== User Agent ==
Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US) AppleWebKit/533.4 (KHTML, like Gecko) Chrome/5.0.375.125 Safari/533.4

Taken at face value, you're having trouble with an Apple Application Support program file there. (Apple Application Support is where single copies of program files used by multiple different Apple programs are kept.)
Let's try something relatively simple first. Restart the PC. If you're using Vista or 7, now head into your Uninstall a program control panel, select "Apple Application Support" and then click "Repair". If you're using XP, head into your Add or Remove Programs control panel, select "Apple Application Support", click "Change" and then click "Repair".
If no joy after that, try the more rigorous uninstall/reinstall procedure from the following post. (If you've got XP, although the procedure is for Vista and 7, just read "Computer" as "My Computer", read "Uninstall a program control panel" as "Add or Remove programs control panel" and assume the system is 32-bit, and you'll be doing the right things.)
Re: I recently updated to vista service pack 2 and I updated to itunes 10.2.1 and ever

Is it possible to have 5.1 S/PDIF input from the pins of Audigy 2 ZS SB0350?

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I suddenly need to start Firefox in Safe Mode or it will not open. The problem after deleting extensions and adding profiles appears to be Session Manager which I have been using successfully for along time and really enjoy its usefulness. is there a fix to this problem?? Thank you.

I'm not using that extension, so I do not know which files are used in addition to sessionstore.js and you need to check the profile folder yourself for suspect files.
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See http://kb.mozillazine.org/Session_Restore

Starting Firefox in Private mode from the pinned ico in taskbar causes Windows Explorer to crash.

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