I just upgraded and now Firefox is not yet open!

Can I revert to a previous version

What happens when you try to start Firefox?

Some things that might be relevant according to the answer...

Sometimes Firefox 'hangs' when starting. The process is in memory but no longer works. In this case, you may need to use the Windows Task Manager to 'kill' the process.

  • You can launch Windows Task Manager by pressing Ctrl + SHIFT + ESC.
  • First check the Applications tab, and then look under the tab process (for firefox.exe).
  • You can select the item of blocking and use the end task button or complete the process. Note that if Firefox were actually used, it could result in data loss, but since it is not yet displayed, it should be OK.

Sometimes a firewall program control will block an update Firefox as being possibly modified by malicious software. In these cases, it can help to erase any reference to Firefox between the firewall and do detect again the application when you try to start it.

Tags: Firefox

Similar Questions

  • The computer date went before a day, switched back and now Firefox will not record history.

    Hey guys! My brothers and sisters have decided to play a trick on me and changed my computer to the front of a week time (panic ensued). I changed it to the current date, 07/30/2104 21:18 (at time of writing), and now Firefox will not trace of my story. Just one day, I changed the time on the computer to the front and then Firefox will begin to record history. Changed, there again at the present time and also return one day and it will not save. Story work for Google Chrome and Internet Explorer.

    TL:Dr - Firefox became the TARDIS and stepped forward in time to save the history.


    Some Firefox problems can be solved by performing a clean reinstall. This means that you remove Firefox program files, and then reinstall Firefox. Please follow these steps:

    Note: You can print these steps or consult them in another browser.

    1. Download the latest version of Firefox from http://www.mozilla.org office and save the installer to your computer.
    2. Once the download is complete, close all Firefox Windows (click on quit in the file menu or Firefox).
    3. Remove the Firefox installation folder, which is located in one of these locations, by default:
      • Windows:

        • C:\Program Files\Mozilla Firefox
        • C:\Program Files (x 86) \Mozilla Firefox
      • Mac: Delete Firefox in the Applications folder.
      • Linux: If you have installed Firefox with the distribution-based package manager, you must use the same way to uninstall: see Install Firefox on Linux. If you have downloaded and installed the binary package from the Firefox download page, simply remove the folder firefox in your home directory.
    4. Now, go ahead and reinstall Firefox:
      1. Double-click on the downloaded Setup file and go through the steps in the installation wizard.
      2. Once the wizard is completed, click to open Firefox directly after clicking the Finish button.

    More information on the resettlement of Firefox can be found here.

    WARNING: Do not use an uninstaller to third parties as part of this process. This could permanently delete your Firefox profile data, including but not limited to, extensions, cache, cookies, bookmarks, personal settings and passwords saved. They can be retrieved easily unless they have been backed up on an external device! See back up and restore the information contained in the profiles of Firefox.

    Please report to say if this helped you!

    Thank you.

  • I changed my preferences of Firefox and now Firefox does not open.

    I changed my security settings and privacy and delete my cookies. When I tried to open Firefox, it would not open. I deleted Firefox to my Mac Applications, Safari used to download Firefox 42.0, and Firefox is not yet open. How can I fix? (I ALWAYS use Firefox rather than Safari.)

    Thank you. I'm fine now. I appreciate your help.

  • My computer has not extinguished properly and now firefox will not restore my last session or load pages in all.

    My computer off badly and now firefox does not load pages or restore my previous session. I tried to restart firefox and my system, but firefox still doesn't load anything. Help, please.

    The above information is on the search for profiles. Https://support.Mozilla.org/en-us/KB/managing-profiles#w_removing-a-profile Here's how to remove. CAVEAT! This will delete your bookmarks, cookies, and browsing history.

  • I trashed my mimetypes.rdf file to restore stocks of download, and now Firefox will not open because profile missing, please notify

    Until very recently, when I want to download a pdf file, it will open automatically, and recently, for some reason, it stopped automatically opening and just downloaded on my desktop where I wanted. I found the instructions on Mozilla if files uploaded but not display, displaying my profile and then folder to delete. I've trashed (different from delete?) and now if I try to open Firefox, I get the message that Firefox cannot open/load because the profile is missing. Please tell us how can I get the profile folder in.

    Thank you

    Create a new profile as a test to see if your profile is the source of the problems.

    See "create a profile":

    If the new profile works then you can transfer files from a profile in the new profile, but make sure not to copy corrupted files.

  • I've updated to 8.0 and now firefox will not open and I get an error message indicating that 7.0.1 is not compatible with version 8.0 of the Min and max version 8.0. What can I do now?

    I tried to uninstall 7.0.1 and reinstall only and still it would not to date and problems such as the loss of my favorites and have different toolbars and Add ons whenever I opened it. I lost so many bookmarks and it became so frustrating that I decided to try to upgrade to see if that could overcome the problems. And now I have this problem. When I did a search on my hard drive to see the components of firefox how was I found firefox files and documents in all directions and I was wondering if I should just delete everything related to firefox to clean all residual files which could be causing problems and then start a clean download , but I didn't want to delete files in windows and didn't know what I should delete and I have to leave. Can anyone help? I miss my firefox and the wish that I had never upgraded to 7.0.1.

    If you use ZoneAlarm Extreme Security then try turning off virtualization.

    See also:

  • Upgraded to v8 FF and no, it will not yet open, just says "not responding".

    Upgrade FF v 8 today and it worked for a while, now when I open it, a window opens and says atop Firefox does not. I uninstalled it and re installed Firefox and still nothing. This happened shortly after the installation of new version of spyware doctorâ„¢ if it has something to do with anything either.

    One possible cause is security software (firewall) that blocks or limits Firefox or plugin-container process without informing you, possibly after the detection of changes (update) for the Firefox program.

    Delete all rules for Firefox in the list of permissions in the firewall and leave your firewall again ask permission to get full unlimited access to the internet for Firefox and the plugin-container and the update process.


  • can I get rid of 36? He installed an update and now firefox does not at all

    Firefox 36 is seriously broken

    He updated on my computer and now does not work. I tried all the suggestions and no help... don't come back to IE

    Hi wskossack, I'm sorry to hear that you have problems with Firefox 36. I also regret that we have not been able to get this working for you yet.

    If what you really want is to uninstall Firefox we can do. Of course, I have to ask if you'd be willing to let my help allows you to get the most up to the working version of Firefox. But Firefox is all about the ability to customize. If you want we can install the latest version of Firefox and you can use it until the next version comes out or while we work to get 36 Firefox works for you. I will try to cover all the options in my answer.

    First of all, I turn the uninstall of Firefox. If you want to watch the article click here that this can be done in 7 steps

    I would recommend that you completely uninstall Firefox and install again. This will fix likely problems you have right now. Because you're asking how to do this, I'll assume that you have not tried this.

    If you have Vista or Windows 7:

    (1) close all open Firefox Windows.

    (2) at the start menu click Control Panel

    (3) click on uninstall a program

    (4) from this list chose Firefox

    (5) click on uninstall (they are located up turds)
    If the uninstall wizard does not work, you can start it manually by running helper.exe, located in one of these locations by default:
    (32-bit Windows) C:\Program Files\Mozilla Firefox\uninstall\helper.exe
    (64-bit Windows) C:\Program Files (x 86) \Mozilla Firefox\uninstall\helper.exe

    (6) in the Firefox uninstall wizard click Next and on the next page, click Uninstall and then click on finish

    (7) to remove other files and folders that cannot be removed by uninstall it, you must manually remove the Firefox installation folder, which is located in one of these locations by default:

       (32-bit Windows) C:\Program Files\Mozilla Firefox
       (64-bit Windows) C:\Program Files (x86)\Mozilla Firefox

    The uninstall program removes all the data user such as history or bookmarks. To completely remove these data, you must manually delete the folder containing your Firefox user profile:

       Click the Windows Start button.
       Type %APPDATA% in the search field and press enter to open the hidden Roaming folder.
       Open the Mozilla folder


       Delete the Firefox folder.

    Now, I'll go on how to get the latest version of Firefox installed on your computer. If you want to watch the article click here . If you decide that's what you want please read the article for more information security helpless.

    Firefox 35.0.1 was the latest version of Firefox, and you can get it by clicking here . The link is also in the article. If you do this, you will need to disable the automatic update. To do this, go to options, then go to advance. The title of the advance, there will be a subtab. You want to go to update. You can then select never check or to tell you when there is an update.

    So the only thing left is for me to help you with any problem you are having with Firefox 36. I hope that you will give me a chance. In any case, if you need more information or help with everything I went please let me know.

  • This is updated to firefox and now firefox is not working properly.

    I ran firefox Setup Stub 33.0 9Firefox was last updated). Now when I run firefox the browser opens and she is black. I can't see anything to use the browser. I've uninstalled and reinstalled without success. I also restarted my computer. I took a screenshot of what it looks like.

    If Firefox is not running, you can start Firefox in Mode safe mode as follows:

    • On Windows: Hold down the SHIFT key when you open the Firefox desktop or the shortcut on the start menu.

    When the Firefox Safe Mode window appears, select "start mode safe." Make sure you have you not click Reset Firefox

  • Firefox update has just finished and now I can not restart Firefox. Get the error message "Cannot find the duration of mozilla"

    Automatic update of Firefox has just finished. After the update update, tried restarting firefox and I received the error message "cannot find mozilla runtime" I tried to restart the computer, but it did not help. How can I fix this so I can restart firefox?

    Hi rjadja, please see if it does not work properly after reinstalling firefox with the full installer instead which can be obtained from https://www.mozilla.org/firefox/all/

  • I had a loss of power, and now Firefox does not start on my XinXP machine. In the process of list is firefox.exe, but no window always opens

    I have Firefox and Thunderbird - both Act the same. When I double click on the exe icon, a process starts, visible in the Task Manager, but no application ever does appear, in applications, or no appaears window. Both worked earlier today.

    Tried the checkdisk - no help.

    I uninstalled (in safe mode because the uninstall program wouldn't work either) of the software of the printer, and then reinstalled as.

    After that, thunderbird and firefox have both worked very well. Part of Windows must have got dirty up/stuck by being apparently corrupted printing software. Printer icon never showed up. Firefox and Thunderbird must have tried to read printer data at startup and hung out to dry...

    Thanks for the quick reply

  • Hate 4, System Restore tried to get version 3 back, now firefox will not open

    After the upgrade to ver. 4, I had to start using for example to use the Court report sites and county tax sites and had other problems if I need to return ver.3

    I did a system restore and now Firefox does not open. (Edition Vista Home premium)

    No problem.

    Click on "programs and features" in your control panel. You will see your old version of 3.6 it and NOT version 4.

    Uninstall the version 3.6 DO NOT click the check box to delete your stuff.

    Go here and reinstall the version 3.6.17: http://www.mozilla.com/firefox/all-older

    It undertakes to repair your version 3 and you will be operational with your old favorites, etc.

    I got calls from a dozen people with this problem, and it's the solution.

    Enjoy your v.3.6.17

  • I'm on windows 7 and I upgraded to 10.0.2 and now it does not open. I completely deleted firefox and transferred again, and it does not work. So my last attempt, I removed firefox 10 again and downloaded the beta version and once more nothing.

    I'm on windows 7 and I've upgraded to the latest version of firefox, and now it will not open. I completely deleted firefox and transferred again, and it does not work. Then, I was that he could get through my firewall, and that has not worked. So my last attempt, I removed firefox 10 again and downloaded the beta version hoping that would make it and once again, nothing. It opens at all. Please help - y at - it a live chat or a number to speak to someone at Firefox?

    -Microsoft got a big update last night for the Windows 7 and I came this morning I was wondering if the update would help my FireFox. I thought it might because a lot of things in this forum said it was a security problem and they have been updated with security updates. SHAZAM! Firefox is now the new my browser to goto. Very happy to resume. Once more I did anything this morning, but click the icon after the big windows 7 update and we're back in business. Thanks for all your help!

  • I've just updated to the latest version and now I can not manually type in the URL. I can't get to a new page if I click on a link.

    I've just updated to the latest version of Firefox 32.0.3 today and now I can not manually type in the URL. I can't get to a new page if I click on a link. I had to use - gasp - Chrome just to get to this help page!

    I tried to restart Firefox.
    I can type (not a keyboard problem), but the browser never tries to go to URL, when I hit enter

    Any ideas?

    Thanks - kept looking around and found a rec to make a reset of Firefox. This seems to have worked.

  • To print messages in Gmail, I used to click on "Firefox" in red at the top left. I upgraded and now it's gone. I would like to print an email I received. How do I do that?

    To print messages in Gmail, I used to click on "Firefox" in red at the top left. I upgraded and now it's gone. I would like to print an email I received. How do I do that?

    Make sure that you run not Firefox mode full screen (press F11 or Fn + F11 to toggle; Mac: Ctrl + Shift + F).

    You see the orange Firefox button if the menu bar is hidden (view > toolbars).

    If the menu bar is hidden, then press the F10 key or hold down the Alt key to make the call of menu bar.

    Make toolbars like the toolbar 'Navigation' and the 'personal bar' are visible: "view > toolbars" or "Firefox > Options.

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