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Firefox 49 won't start after installation

OS : Windows 7 x64 I was using Firefox 48.0.2 (x64) - french version. I manually downloaded and installed Firefox 49.0 (x64). After installation, Firefox does not start :… (lire la suite)

OS : Windows 7 x64 I was using Firefox 48.0.2 (x64) - french version. I manually downloaded and installed Firefox 49.0 (x64). After installation, Firefox does not start : - the firefox.exe process is running, using something between 5000 and 65000 Mb of memory - nothing else happens : the process does nothing, using 0% CPU

I've seen this issue : - on several PC's of my organization - after automatic update or manual update - after having deleted my Firefox profile - after having disabled Kasperky Antivirus

I've noticed that the last version of Firefox Developer Edition has the same behaviour : install OK, won't start.

Going back to previous version is OK : Firefox starts again.

Asked by assistance-multi il y a 3 ans

Last reply by Truckerman il y a 3 ans

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Browser 49.0.1 will not show up on my computer running XP SP3.

I am running XP SP3 and Firefox just updated to 49.0.1 and suddenly....NO Firefox! I can see that the program is running in the Task Manager Processes but the application… (lire la suite)

I am running XP SP3 and Firefox just updated to 49.0.1 and suddenly....NO Firefox!

I can see that the program is running in the Task Manager Processes but the application does not run on my computer. If I try to load it again, another instance will show up in task manager processes - each time it is about 48,000K.

I have tried:

shutting down/restarting ending process/process tree

And I have tried all steps for a clean install with and without uninstalling the application:

-uninstall in the add/remove utility (will not uninstall) -deleting installation directory (will not delete, says it is in use by another person or program) -deleting temporary Firefox data (I could accomplish that) -deleting Windows Firefox prefetch (I could also accomplish that) -re-installing 49.0.1 (yes I can install, but to no avail)

I also tried an online tech support that tried to fix things in safe mode. Futile, and then the computer got stuck in safe mode and would not boot into normal. The computer had to be set for a week ago, which gave me Firefox back at version 48. But even that would not open because of something about XPCOM (sorry I am unable to remember the exact error message).

After that I once more uninstalled and re-installed 49.0.1. It's in my programs. But still nothing. I'm exhausted.

Do I just give up on Firefox? Any other possibilities?

Thanks to anyone who might be able to work with me on this.

Asked by mhalpert il y a 3 ans

Last reply by philipp il y a 3 ans

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Firefox window does not open, but it is on the task manager list

As the question says, Firefox does appear on the task manager as open but the window is not actually there. I tried reinstalling it, but it did not help. I also tried run… (lire la suite)

As the question says, Firefox does appear on the task manager as open but the window is not actually there. I tried reinstalling it, but it did not help. I also tried running as administrator and in the safe mode - still nothig. I know it did work earlier, then it began to open very slowly and now the window doesn't appear at all. I don't use this computer, my mom does, so I don't know any more details. The system is windows 10 upgraded from windows 8. Hope someone could help me with this.

Asked by Flameborg il y a 3 ans

Last reply by philipp il y a 3 ans

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Firefox will not load, even in safe mode

This evening, Mozilla FIrefox stopped working on my PC (windows 7, 64 bit, Firefox 49.0.1) When I start it, there's a 32k process running firefox.exe, but no window opens… (lire la suite)

This evening, Mozilla FIrefox stopped working on my PC (windows 7, 64 bit, Firefox 49.0.1)

When I start it, there's a 32k process running firefox.exe, but no window opens.

I have uninstalled firefox, deleted the profile folder, registry settings and everything, reinstalled and it still won't run. I have tried turning off Kaspersky and trying safe mode and the results are the same.

I scanned with MalwareBytes and nothing is reported.

The only way firefox starts is if I start windows in safe mode. Any ideas?

Asked by brendanlo il y a 3 ans

Last reply by philipp il y a 3 ans

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Firefox will not start anymore on Windows 10 Pro

Within the last few days, Firefox is ceasing to work on our Windows 10 Pro machines. Possibly after receiving the latest update to 49. Have uninstalled and re installed … (lire la suite)

Within the last few days, Firefox is ceasing to work on our Windows 10 Pro machines. Possibly after receiving the latest update to 49.

Have uninstalled and re installed with fresh download. No help

Asked by kaitlynnm il y a 3 ans

Last reply by philipp il y a 3 ans

  • Archivé

I downloaded and installed Firefox but it won't open. It is running somewhere as I can see t in task manager, but no browser appears.

As stated above, FF just won't function. I have tried starting FF in safe mode but it still won't run any kind of browser or application, other than appearing in task man… (lire la suite)

As stated above, FF just won't function. I have tried starting FF in safe mode but it still won't run any kind of browser or application, other than appearing in task manager. I have uninstalled/reinstalled, rebooted, etc, but there's no change. I have a fairly new machine, running windows 10 and i7 core. Chrome and MS Edge are working fine. Help me pls!

Asked by pirran il y a 3 ans

Last reply by philipp il y a 3 ans

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Firefox not opening or loading

My Firefox updated itself and wont start at all, which is odd as it was working fine before. I am using Window 8.1 64 bit version, when checking in the task manager there… (lire la suite)

My Firefox updated itself and wont start at all, which is odd as it was working fine before. I am using Window 8.1 64 bit version, when checking in the task manager there is a process running using 30mb and 0% cpu .

Stuff i tried so far:

- try loading it in safemode - still doesn't load
- tried deleting the profiles found under users/appdata
- tried uninstalling and downloading a fresh copy.
- tried disabling kaspersky and malwarebytes

any other suggestions?

thanks

Asked by firefoxmole il y a 3 ans

Last reply by philipp il y a 3 ans

  • Archivé

FF49 does not open Window, but is running in Taskmgr. Issue?

Having the same issue as others posting to this site. Had older version of FF running for years until very recently. I have tried: 1. Updated to FF 49 2. Run several Vi… (lire la suite)

Having the same issue as others posting to this site. Had older version of FF running for years until very recently. I have tried:

1. Updated to FF 49 2. Run several Virus scanners as recommended in other articles on this site. Some PUP and Adware results found and quarantined. 3. Tried to recreate Profile, but Profile mgr does not run 4. Renamed xulstore.json and localstore.rdf, but did not help nor recreate these files.

I am unable to add the requested troubleshooting info as I cannot access Help

Any advice is appreciated

Asked by claible il y a 3 ans

Last reply by philipp il y a 3 ans