Question about Mozilla Firefox

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When I go to open Firefox a bottom pops up saying, "firefox is already open" that I need to restart my computer" to log on. This happens quite often, and I actually do not have any windows open to close. Please help.

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Probably you have a trojan virus in your system. Try to do a System Restore to solve the problem. Scan your computer afterwards with your anti-virus. If this not solve the problem, try to use your Windows OS CD installer, boot it and use CHKDSK to repair files and your system.

Posted on Jan 03, 2011


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High Usage pop up

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-> mouse over "Pop-up Blocker."
->Click the "Turn on Pop-up Blocker" option.

For Firefox
->Click the "Firefox" button to open the drop-down menu.
->Click "Options."
->Click the "Content" tab.
->Click to check the box next to "Block pop-up windows."
->Click "OK" to save your changes.

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Sep 30, 2012 | E-Machines Computers & Internet

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Firefox will not open. getting a window that says "firefox is already running" (when it is not) "but is not responding. to open a new window, you must first close the existing firefox...

if you go to task manager and you will be able to kill the proses i hope this helps my self i use Linux and you can resolve the problem easy

Aug 09, 2011 | Mozilla Firefox

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On by Aspire One with Linpus Linux Lite v1.0.15.E, I am connected to my network but cannot connect to the browser. I get a message: "Firefox is already running, but is not responding; To open a new...

This could happen after your netbook crashed or turned off while Firefox was still running. When Firefox is running, it puts a file called "parent.lock" in your Firefox profile directory. If you delete that file, Firefox should start properly again.

I'm not sure exacly where the profile directory is on your system (I currently don't use Linpus Lite anymore), but it should be somewhere in your home directory in .firefox or .mozilla. Maybe this page could help you find it.

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How to close firefox browser?

The easiest way is to press the x button or press alt+F4 buttons at the same time. Another way is to press ctrl+alt+delete buttons at the same time and open the task manager. After you open the task manager, you end any process that says mozilla firefox. If that does not work, log off or restart the computer. If the problem keeps happening reinstall or repair firefox under add and remove programs in the control panel. If any of these do not work, use google chrome, opera, or even go back to internet explorer if any of the former do not work. Hope any of these tips will help.

Dec 31, 2010 | Mozilla Firefox

1 Answer

When trying to launch Firefox using Vista, I get a dialogue box says Firefox is already running. I have to restart the system before it will open.

You can kill it by using task manager brought up by CTL+ALT+DEL. You can reinstall FireFox to fix some issues with its files, settings and updates.

Jul 09, 2010 | Mozilla Firefox

2 Answers

Firefox is already running, but is not responding. To open a new window, you must first close the existing Firefox process, or restart your system.

remove firefox under ad and remove programs also under programs delete any residual files from firefox including cookies and internet history etc. restart you pc and reinstall Firefox.

Dec 13, 2009 | Mozilla Firefox

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Flash player is installed but not detected by appln

The problem seems to be conflict in the .dll file "NPSWF32.dll" and it's association with the Windows Registry. The registry key of the flash player for Mozilla Firefox is damaged/corrupted. So you have to uninstall Flash Player: (Follow both the steps.)
Step-1: First uninstall through ADD/REMOVE Programs from controls panel.
Step-2: Then download the Adobe Flash Player uninstaller from here. Now close both Firefox and Internet Explorer. Then run the uninstaller tool. After uninstalling, restart your PC. Now open the firefox and go to to install the latest version flash player.
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Jan 26, 2009 | Microsoft Windows XP Professional x64...

1 Answer

Adobe Reader 9 problem

I would like to help you to quickly solve this problem. Yes, you will need to install an add-on that will allow you to view PDF files in your FireFox browser. Follow these instructions.
1) Go to 2) On the navigation menu at the top, click on "Add-ons". 3) Next, in the text field where it says "search for add-ons", type "Adobe reader". 4) The add-on is named "PDFescape Extension". 5) Then click on the green button "add to firefox" located to the right of the add-on name. 6) A pop-up window will appear with the name of the add-on, in this case "PDFescape Extension". 7) Next you will see the "Install" button located at the bottom of this pop-up window, click it to install the add-on. After this, the pop-up window will close and open a install window. 8) In this download window, you will notice the progress of the download. When it is complete, you will be prompted to restart firefox. To do so, simply close the firefox browser window, and then start firefox up again. 9) To test the add-on, try viewing a pdf file in the firefox browser.
That's it!
I hope this helps. Please let me know if you have any questions.
Thank You,

Jan 24, 2009 | Computers & Internet

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