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firefox version 48 is the latest that will run, after update to higher versions it will no longer run on win10

About a week ago I could no longer open firefox (my standard browser) I could not find what causes the problem. Firefox would appear in 'task manager' but not on the scre… (funda kabanzi)

About a week ago I could no longer open firefox (my standard browser)

I could not find what causes the problem. Firefox would appear in 'task manager' but not on the screen to start using it.

I came across an old version of firefox in my downloads and installed this.

I now have found out that the latest working version for me is 48.0.2. I also tried the nightly version 52 but it didn't work neither. Currently I am running 48.0.2 after the auto-update I will no longer be able to use firefox and will have to reinstall 48.0.2

I am using a desktop version of Windows 10 Pro / 64-bit / Dutch version On: i5-4670 cpu @ 3.4Ghz / 8Gb RAM

Asked by beedeew 3 iminyaka edlule

Answered by beedeew 3 iminyaka edlule

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firefox wont start after update win10

Received a notification to restart firefox to apply an update, clicked on restart, it did the upgrade process, the window closed but firefox did not start. I could see fi… (funda kabanzi)

Received a notification to restart firefox to apply an update, clicked on restart, it did the upgrade process, the window closed but firefox did not start. I could see firefox.exe process running in my task manager. i restarted my system, tried uninstalling and reinstalling different versions. deleted appdata/mozilla, disabled my security software (kaspersky antivirus) but nothing helped. I see the process running in task manager and Profile manager and safe mode do the same thing as well. I am not sure if this has any relevance, but i did install a "big" windows 10 update on friday. but everything worked great untill i clicked restart firefox. any help will be appreciated.

Asked by asifbalgar 3 iminyaka edlule

Answered by philipp 3 iminyaka edlule

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Firefox won't start after update 49.0

Hello, dear friends. Browser updated itself to version 49.0. However, Firefox restarts and nothing happens. There is a Firefox.exe running in system processes. But there … (funda kabanzi)

Hello, dear friends. Browser updated itself to version 49.0. However, Firefox restarts and nothing happens. There is a Firefox.exe running in system processes. But there are no any error messages nor a Firefox's window. I've checked Crash reports folder. But there are no new files dated this month. I've launched Firefox in safe mode via Windows key + R -> firefox -safe-mode - still the same issue. Turned off my AV and any other soft, restarted PC many times and so on. Moreover, I've tried to install new Firefox in Sandboxie (sandbox utility) - also nothing happens. Firefox launched as a process and that's all. 10 mins, 30 mins - nothing. Could you be so kind and let me know if it's possible to fix this issue somehow, please? I've downgraded my FF to 48.0.2 and it works fine, but you know - it'd be nice to have an upgraded one. Thank you in advance.

Asked by leningrib 3 iminyaka edlule

Answered by assistance-multi 3 iminyaka edlule

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Firefox on W7 starts but is "invisible": process runs but is unusable

I've used Firefox for years on my DELL Windows 7 laptop. After a recent, weekly reboot, it stopped working. By that, I mean that when I run it, a firefox.exe appears in t… (funda kabanzi)

I've used Firefox for years on my DELL Windows 7 laptop. After a recent, weekly reboot, it stopped working. By that, I mean that when I run it, a firefox.exe appears in the task manager but I can't "connect" to it. On the task manager I can see that it is using Memory and has a value for both I/O read Bytes and I/O Write Bytes (albeit these do not change after Firefox has started)

I've tried the following

Removed Firefox from the control panel & reinstalled

Renamed firefox directories ("C:\Program Files (x86)\Mozilla Firefox" & C:\Program Files (x86)\Mozilla Maintenance Service), rebooted and reinstalled

Looked in these forums and have tried solutions to problems that sound VERY similar to mine (e.g. https://support.mozilla.org/en-US/questions/1128956)

Did a virus scan

Ran a Malware bytes scan

Reinstalled java

Tried to run Firefox in Safe Mode (hold down SHIFT and double click on icon)

Run Firefox from the command line with various options - e.g. "firefox /safe"

Tried installing both the 64bit (as used originally) and 32bit versions

Fiddled around with profiles in C:\Users\USERNAME\AppData\Local\Mozilla\Firefox\Profiles as per various recommendations in these forums


But none of these work. Afterwards, Firefox just appears in the Task Manager (but NOT the Task Bar) and does nothing.

The only thing that does work is if I reboot my laptop into Windows Safe Mode (with networking). This allows Firefox to work but there is nothing obvious wrong with anything, so I don't know what to fix. I tried switching off Hardware acceleration in Firefox options but this made no difference once I did a normal reboot of the laptop.

My Laptop has an up to date W7 OS and all both Chrome and IE browsers work fine - as does everything else. Firefox is the only problem and then only since Monday - it has worked fine for many years up to Friday. No changes were made on the day the Laptop was restarted, no new programs installed, nothing. A colleague has a similar setup (company-dictated config on W7 laptop, same OS, Virus scanner, etc) and has no problems.

At this point I've done many reboots, reinstalls, searching for solutions but nothing works. What is interesting is that I'm not the only person to have this exact problem (see link above) but so far a solution eludes me.

Any help very greatfully received - Please Help!

Asked by route66 3 iminyaka edlule

Answered by assistance-multi 3 iminyaka edlule

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Firefox stopped launching. Uninstalled & reinstalled. Went normally but Firefox still won't launch. The firefox process comes up. help

FF 49.0.1, Window 7, 32-bit, Dell Latitude laptop. Firefox stopped launching, i.e. opening the UI. Fails to appear in the Task Manager "Applications" tab. Does appea… (funda kabanzi)

FF 49.0.1, Window 7, 32-bit, Dell Latitude laptop. Firefox stopped launching, i.e. opening the UI. Fails to appear in the Task Manager "Applications" tab. Does appear twice in the Task Manager "Processes" Tab. Two sizes 15576K and 3700K. I tried uninstalling, rebooting, and re-installing. The uninstall appeared to run successfully. The subsequent installation appeared to run correctly. All file folder have correct date/time stamps.

Perhaps there some residual file that needs to be removed in order for Firefox to initialize properly? If so, what/where is it?

HELP, please.

Asked by WTC71 3 iminyaka edlule

Answered by asifbalgar 3 iminyaka edlule