Can not open my firefox browser on my laptop

Try to vet online but the browser will not open.

A possible cause is security software (firewall,anti-virus) that blocks or restricts Firefox or the plugin-container process without informing you, possibly after detecting changes (update) to the Firefox program.
Remove all rules for Firefox and the plugin-container 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 and the updater process.
See:
*https://support.mozilla.org/kb/Server+not+found
*https://support.mozilla.org/kb/Firewalls
You can use one of these to start Firefox in Safe mode to see if that works:
*On Windows, hold down the Shift key while starting Firefox with a double-click on the Firefox desktop shortcut
*On Mac, hold down the Options key while starting Firefox
*Help > Restart with Add-ons Disabled
*https://support.mozilla.org/kb/Safe+Mode
See also:
*http://kb.mozillazine.org/Browser_will_not_start_up

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I can not open my firefox browser

Dbl click on firefox icon on my desktop, I get the hour glass for about 10 seconds and then it does not open at all.

You can try to do a malware scan with two or more different scanners:
[http://www.nortonfreetools.com/freebies.php Norton]
[http://www.kaspersky.com/virusscanner Kaspersky]
[https://www.f-secure.com/en/web/labs_global/removal/online-scanner F-Secure]
[http://quickscan.bitdefender.com/ Bitdefender]
[http://www.trendmicro.co.uk/products/free-tools-and-services/ Trend]
[http://www.microsoft.com/security/scanner/en-us/default.aspx Microsoft]

I have Firefox 10.0.2. and OSX 10.6.8. and the latest PDF adobe reader, and still can not open with the browser PDF files.Can someone help,pls?Thanx

Dear Ones,
I have Firefox 10.0.2. and OSX 10.6.8. and the latest PDF adobe reader, and still can not open with the browser PDF files.Can someone help,pls?Thanx

see if this is helpful : [http://support.mozilla.org/en-US/kb/Opening%20PDF%20files%20within%20Firefox Opening PDF files within Firefox]
thank you
Please mark "Solved" the answer that really solve the problem, to help others with a similar problem.

I can only open one Firefox browser window. When I click the firefox icon from desktop or taskbar to open up another browser window it does not open. I am ablt to open up new tabs within the one window.

I can only open one Firefox browser window. When I click the firefox icon from desktop or taskbar to open up another browser window it does not open. I am ablt to open up new tabs within the one window.

Have you tried: click Firefox button > New Tab > New Window '''''OR''''' CTRL+N '''''OR''''' File > New Window (if using the Menu Bar)
Once open, Firefox locks the Profile that is in use and you can not open another window with that Firefox version and Profile combination using the Windows Desktop icon or the Windows Programs list.

I can not open the Safari browser in the operating system ( os x Mavericks) due to load a program of site

I can not open the Safari browser in the operating system ( os x Mavericks ) ?
due to load a program of site>!!!!
please help me .
thank you

Try this.
Force Quit .
Press command + option + esc keys together at the same time. Wait.
When Force Quit window appears, select Safari if not already.
Press Force Quit button at the bottom of the window. Wait.
Safari will quit.
Relaunch Safari holding the shift key down.

I can not open my firefox. whenever i open it , the window is not open ,some time open that saying error that "firefox does't work corrently" please help me beacause i don't like other browser.......please.......please

Respected sir,m
i only like mozilla firefox browser. but few day ago my system is automatically shutdown. when i restart my system then my firefox is does't open and if it is open then error message is generated. so i can't use my mozilla firefox.
my all programm run perfectly expect mozilla firefox. please solve my problem as soon as possible.

You can try to do a malware scan with two or more different scanners:
[http://www.nortonfreetools.com/freebies.php Norton]
[http://www.kaspersky.com/virusscanner Kaspersky]
[https://www.f-secure.com/en/web/labs_global/removal/online-scanner F-Secure]
[http://quickscan.bitdefender.com/ Bitdefender]
[http://www.trendmicro.co.uk/products/free-tools-and-services/ Trend]
[http://www.microsoft.com/security/scanner/en-us/default.aspx Microsoft]

After updating firefox I can not open the shortcut browser icon, but can open IE, and my whole system seems to be slow. solution please? Now when I open firefox the task manager says the process firefox is running 100% CPU in the background

Updated firefox to latest version with custom install, no task bar or startup (in past I think I usually included startup) late Friday nite. Then when trying to open Firefox shortcut on desktop Sat. could not, would freeze up. Then if I tried to open IE same would happen. After rebooting a # of times, opened IE 1st and worked but still could not open Mozilla within IE or the desktop. Also all our 3 wireless laptops including apple have no problem with this.

You said you tried the recommended solution, but didn't mention what that solution was. Try, from the Firefox menu bar:
 
Tools -> Options -> Content
where you will find an option to block pop-up windows. If that box is checked but there are sites from which you would like to allow pop-up, click the button "Exceptions..." to add sites to your exception list.
See also the help article [[Pop-up blocker]].

CAN NOT OPEN UP FIREFOX...ERROR ENTRY POINT CAN BE ACCESSED FROM XUL.DLL

'''3rd time have been locked out.....can not access mozilla or important sites....error '''reads..... The procedure entry point NS_Set Dl Directory could not be located in the dynamic link library xul.dll.......urgent repair needed.....even when internet explorer ooens....certain sites I stll get that error.....like my bank.....like my contact em list.....help immediate please.

hi, do you have service pack 3 installed on your xp computer?

I can not open my Firefox 4.

Every time I try to open Firefox 4 separate windows pops up with the message:
" JavaScript application . what happened: TypeError: Components.classes['@mozilla.org/extensions/manager;1'] is undefined."
I have to click OK and only than my browser opens up. Does any one knows how to get rid of this message?

It may be because you appear to be running a BETA version of Firefox. Try using the Help | Updates route to update to the full release first. You can also download the full release from here: [http://www.mozilla.com/en-US/firefox/fx/?ref=logo Download Firefox 4.0]
You can downgrade at any time by downloading v3.6.16 from here: [http://www.mozilla.com/en-US/firefox/all-older.html Download Firefox v3.6.16]
Then go to Add/Remove programs and uninstall the current version, but choose to keep your bookmarks, customizations etc. Finally, reboot and then run the installation file you downloaded.

I can not open 2 firefox windows

I am using Windows7
I have disunstalled Firefox 3.6.12 and re-installed it.
When one firefox window is open and if i click on File -> New Window
No new firefox windows opens!
If I surf on a web site and I point with my mouse a link and click rignt and then select "open in Link in a new window", no new window opens!

All I had to remove was AVG Safe Search...AVG Security Tool Bar is ok.
That add-on screw everything up. Gmail notifier, right click pop ups would come up blank (Can't view properties, etc), tool drop down menu's were blank.
Stupid AVG!

I can't open my Firefox browser anymore.

I clicked the icon on my desktop but it just won't open.

Thanks! But is there any other way to restore my tabs and bookmarks? Because I have A LOT and I can't really remember them...

Why I can't see any Firefox browser windows after I open Firefox in Mac?

I open my Firefox as usual, but this time, I can't see any Firefox browser windows come out but only the menu bar on the top was changed into Firefox menu bar. Is there any problem with my Firefox or I accidentally activate some "hiding" function?

I am new to Ubuntu, but I see videos ok. Firefox may play some natively but I also have FlashPlayer installed. IIRC FlashPlayer is not on the original Ubuntu 11.10 CD but has to be installed as a separate Firefox plugin. From your system information aside it appears you do already have FlashPlayer installed.
* Have you got FlashPlayer enabled currently ?
* I Note you have [http://en.wikipedia.org/wiki/DivX Div X] installed, which is not something I know about, but could that be interfering with some videos, have you tried disabling Div X.
See also the articles
*[[Video or audio does not play]]
*[[Viewing video in Firefox without a plugin]]

I have latest firefox in windows 7 64 bit I can not open .eml extensions. what is wrong

I get e mail with .eml extensions. I can not open them yet my wifes same firefox can open them. what is up

-> Save the '''.eml''' file to your desktop and Open it with '''Outlook Express''' or Microsoft Outlook. It will open as a New Email, and this time you should see the contents.
-> Internet Explorer, Firefox, or Opera browsers can Read and View an EML file by changing the extension to '''.MHT''' and then opening it. Just change the extention of email file from '''EML''' to '''MHT''' and then open it under the Web Browser.
Check and tell if its working.

When I try to install Firefox, I get a "can not open output file" error. I was using Firefox before and it stopped working, so I uninstalled. Cannot re-install now.

When I try to install Firefox, I get a "can not open output file" error. I was using Firefox before and it stopped working, so I uninstalled. Cannot re-install now.
== This happened ==
Every time Firefox opened
== I tried to download firefox. ==
== User Agent ==
Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; AntivirXP08; GTB6.3; .NET CLR 2.0.50727; MS-RTC LM 8)

When you click the download link on [http://getfirefox.com GetFirefox.com], you should be asked if you wish to Run or Save the file. If the described situation happens when trying to Run the download, try instead to Save it and put the file on your Desktop or a similar place where you are certain that you can find it again.
When the download is complete, try double-clicking the downloaded file in the normal Windows Explorer (browse your way to the file from My Computer). This should start the installation.
If you notice in the Explorer window that the file seems to be lacking the Firefox orange/blue icon, rightclick the file and select Properties. The picture should look somewhat like the attached picture (except that mine's in danish, but that is irrelevant) if saved correctly - if it does NOT look like this, please describe the contents or attach a screenshot of the box. Especially what it says under "File type" - it should be "Program"; if it's not, we'll have to look into what the problem could be here.
Slightly off-topic, your Internet Explorer seems to be quite a bit out of date (IE 6, where current version is IE 8), so I would strongly recommend that you try to run Windows Update to get your system updated. If this is a company system (like a Terminal Server thin client machine), this may not be possible, and your system administrator will most likely have to help you.

Each time I open my Firefox browser, the tab from the last time opens. I have the browser set to open on my home page, not to the tab from the last time. I keep trying to save the setting for the browser to open on my home page but it doesn't.

Each time I open my Firefox browser, the tab from the last time opens. I have the browser set to open on my home page, not to the tab from the last time. I keep trying to save the setting for the browser to open on my home page but it doesn't.

Try to create a new profile as a test to check if your current profile is causing the problems.
See "Basic Troubleshooting: Make a new profile":
*https://support.mozilla.org/kb/Basic+Troubleshooting#w_8-make-a-new-profile
There may be extensions and plugins installed by default in a new profile, so check that in "Tools > Add-ons > Extensions & Plugins" in case there are still problems.
If the new profile works then you can transfer some files from the old profile to that new profile, but be careful not to copy corrupted files.
See:
*http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox
Do a malware check with some malware scanning programs on the Windows computer. 
You need to scan with all programs because each program detects different malware. 
Make sure that you update each program to get the latest version of their databases before doing a scan. 
*http://www.malwarebytes.org/mbam.php - Malwarebytes' Anti-Malware
*http://www.superantispyware.com/ - SuperAntispyware
*http://www.microsoft.com/security/scanner/en-us/default.aspx - Microsoft Safety Scanner
*http://www.microsoft.com/windows/products/winfamily/defender/default.mspx - Windows Defender: Home Page
*http://www.safer-networking.org/en/index.html - Spybot Search & Destroy
You can also do a check for a rootkit infection with TDSSKiller.
*http://support.kaspersky.com/viruses/solutions?qid=208280684
See also:
*"Spyware on Windows": http://kb.mozillazine.org/Popups_not_blocked

Can not open my firefox browser on my laptop

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