Vyhľadajte odpoveď

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Firefox does not load, opening briefly and then closing

  • 16 odpovedí
  • 1 má tento problém
  • 37 zobrazení
  • Posledná odpoveď od Elliot Grayston

more options

I have had Firefox downloaded for a considerable amount of time and had begun to use it as my daily browser, until I started experiencing issues, concerning the loading. I have experienced this issue in all cases when trying to open the browser through the desktop shortcut, other icons, and even the .exe file, and typically I will see a brief white screen of Firefox before it immediately closes again. Frustrating to say the least and a quick google provides no insight. I have attempted on multiple occasions to uninstall and reinstall, however to no avail, and have even tried to create a new profile, via the Run (Firefox.exe -P) but again with no success. Running the browser in Safe Mode (Shift) will also work for a split second with the dialogue opening and then instantly shutting. Any suggestion on a potential fix would be great.

Všetky odpovede (16)

more options

What's your computer system and Firefox version?

Some problems occur when your Internet security program was set to trust the previous version of Firefox, but no longer recognizes your updated version as trusted. Now how to fix the problem: To allow Firefox to connect to the Internet again;

  • Make sure your Internet security software is up-to-date (i.e. you are running the latest version).
  • Remove Firefox from your program's list of trusted or recognized programs. For detailed instructions, see

Configure firewalls so that Firefox can access the Internet. {web link}

Pomohla vám táto odpoveď?

more options

You can check for issues caused by a corrupted or incomplete Visual C++ installation that is missing runtime components (Redistributable Packages) required by Firefox.

See "Visual Studio 2015, 2017 and 2019":

Pomohla vám táto odpoveď?

more options

FredMcD said

What's your computer system and Firefox version?

Thanks for the swift responses. I am running Firefox version 85.0.2 on an Intel I7, 32GB RAM, Windows 10 Pro (VersionVersion - 10.0.19041 Build 19041).

I have removed Firefox from my program's list of trusted or recognized programs, as suggested however to no avail.

Upravil(a) Elliot Grayston dňa

Pomohla vám táto odpoveď?

more options

Start Firefox in Safe Mode {web link}

A small dialog should appear. Click Start In Safe Mode (not Refresh). Is the problem still there?


Start your Computer in safe mode with network support. Then start Firefox. Try Secure websites. Is the problem still there?

http://encyclopedia2.thefreedictionary.com/Linux+Safe+Mode Starting Any Computer In Safe Mode; Free Online Encyclopedia

Pomohla vám táto odpoveď?

more options

Apologies for the delayed response.

Attempting to start Firefox in SafeMode experiences the same issue, whereby I can briefly see the modal/dialogue flash up before closing down again. Starting my device in SafeMode also has not resolved the problem.

I did note that running one of my web applications in Visual Studio 2019 to be viewed in Firefox continually ran my project even though no browser tab opened. This might not be of much use but thought it was worth a mention.

Pomohla vám táto odpoveď?

more options

Do a clean reinstall of the current Firefox release and delete the Firefox program folder before installing a fresh copy of the current Firefox release.

If possible uninstall your current Firefox version to cleanup the Windows Registry and settings in security software.

  • do NOT remove "personal data" when you uninstall the current Firefox version, because this will remove all profile folders and you lose personal data like bookmarks and passwords including personal data in profiles created by other Firefox versions

Remove the Firefox program folder before installing that newly downloaded copy of the Firefox installer.

  • (64-bit Firefox) "C:\Program Files\Mozilla Firefox\"
  • (32-bit Firefox) "C:\Program Files (x86)\Mozilla Firefox\"
  • it is important to delete the Firefox program folder to remove all the files and make sure there are no problems with files that were leftover after uninstalling

Your personal data like bookmarks is stored in the Firefox profile folder, so you won't lose personal data when you reinstall or update Firefox, but make sure NOT to remove personal data when you uninstall Firefox as that will remove all Firefox profile folders and you lose your personal data.

If you keep having problems then you can create a new profile as a quick test to see if your current profile is causing the problem.


Reinstall Firefox

Pomohla vám táto odpoveď?

more options

Thanks for the response.

As suggested I have complete a full fresh install of Firefox, via the link provided ensure that the directory in (64-bit Firefox) "C:\Program Files\Mozilla Firefox\" had been deleted. Again the problem remains and I have already tried to create a new profile as stated in an earlier post. Nevertheless, I attempted to create a new profile, however as I cannot access the browser, I took the approach to run Windows + R to open to Run prompt. From here I executed the firefox.exe -P command and as before this briefly loaded a dialogue before closing down again.

Thanks for the suggestions anyway. All good help.

Pomohla vám táto odpoveď?

more options

You did not say if you tried to

FredMcD said

Start your Computer in safe mode with network support. Then start Firefox. Try Secure websites. Is the problem still there? http://encyclopedia2.thefreedictionary.com/Linux+Safe+Mode Starting Any Computer In Safe Mode; Free Online Encyclopedia

Pomohla vám táto odpoveď?

more options

FredMcD said

Start your Computer in safe mode with network support. Then start Firefox. Try Secure websites. Is the problem still there?

My apologies I missed this out. I have started my device in safe mode and have been able to access Firefox. The browser loads correctly and is all operational, however loading Windows normally results in the error occurring.

Pomohla vám táto odpoveď?

more options

Good. Now we are getting somewhere.

As a test, disable your protection programs. Then start Firefox.

Pomohla vám táto odpoveď?

more options

Disabled all protection programs as suggested by no luck. Thanks.

Pomohla vám táto odpoveď?

more options

Then it's something else on your system.

Pomohla vám táto odpoveď?

more options

In continuation of this thread, I have made some advances. Over a week ago I completely installed Firefox and disregard the issue for the time being as other browsers are available to use. Yesterday I had some time a reinstalled Firefox and to my surprise loaded and ran smoothly. Therefore I imported my bookmarks etc and set up the settings as needed and late last night stopped work for the day with everything working as expected.

Note that I have made no changes since in between uninstalling and reinstalling the application. However, this morning opening the browser has once again returned to the previous state of play, where it briefly loads and then closes again and therefore is once again unusable.

Any thoughts?

Pomohla vám táto odpoveď?

more options

Were you previously running other software that may have loaded libraries ?

You can check for issues caused by a corrupted or incomplete Visual C++ installation that is missing runtime components (Redistributable Packages) required by Firefox, especially VCRUNTIME140_1.dll.

See "Visual Studio 2015, 2017 and 2019":

Pomohla vám táto odpoveď?

more options

Thanks, cor-el.

Completed the install and restarted my device and loaded firefox. This opened a dialogue stating that the browser closed with an unexpected error with options start in Safe Mode or Restart the application.

This dialogue was present until it I loaded the project I have been working on in VS2019, which then resulted in the repeated issue occurring of the browser opening and then closing pretty much instantaneously.

Can't be sure that VS cause the dialogue to close however until then I had more access to Firefox than previously.

Thanks.

Pomohla vám táto odpoveď?

more options

If it helps I can see a VCRUNTIME140.dll file in C:\Program Files\Mozilla Firefox. Also worth noting that I had both Firefox and VS2019 running simultaneously and working as expected yesterday. Thinking back to the first time I encountered the issue, I opened Firefox as a fresh new install and used it for the rest of the day. Upon shutting down my device and then attempting to the use browser the next day, I was then faced with the same problem as now. It would seem that the browser would work on the day of install but thereafter I would experience the issue explained here and in the original post.

Pomohla vám táto odpoveď?

Položiť otázku

Ak chcete pridať odpoveď, musíte sa prihlásiť k svojmu účtu. Ak účet doteraz nemáte, položte novú otázku.