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Firefox won't quit

  • 17 பதிலளிப்புகள்
  • 17 இந்த பிரச்னைகள் உள்ளது
  • Last reply by FredMcD


I am using Firefox on my Macbook Pro.

When I quit Firefox, the windows close but the programme remains open on my dock with the dot underneath, as if it's still open.

Force quit doesn't work, and it is not showing up in activity monitor, so there is nothing to force kill there.

I then can't restart Firefox without restarting my computer.

All Replies (17)

After closing everything else, force quit the computer.

Start Firefox in Safe Mode {web Link} by holding down the <Shift>
key, and then starting Firefox. Is the problem still there?

While still in Safe Mode,

Type about:support in the address bar and press Enter. Under the main banner, press the button; Copy Text To Clipboard.. Then in the reply box at the bottom of this page, do a right click in the box and select Paste. This will show us your system details. No Personal Information Is Collected.


Thanks for replying.

It still happens in Safe Mode.

I don't see a 'Copy Text To Clipboard' button in about:config.


Kneale said

I don't see a 'Copy Text To Clipboard' button in about:config.

FredMcD said

Type about:support in the address bar and press Enter.

Sorry, I misread that.

Application Basics

Name: Firefox Version: 43.0.4 Build ID: 20160105164030 Update Channel: release User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.11; rv:43.0) Gecko/20100101 Firefox/43.0 Multiprocess Windows: 0/1 (default: false) Safe Mode: true

Crash Reports for the Last 3 Days

Report ID: bp-698dd773-3e1f-469d-a110-8531c2160123 Submitted: 9 hours ago

All Crash Reports


Name: Virtual Keyboard Version: 14.0 Enabled: false ID:


Asynchronous Pan/Zoom: none Device ID: 0x0166 GPU Accelerated Windows: 0/1 Basic Supports Hardware H264 Decoding: No; Vendor ID: 0x8086 windowLayerManagerRemote: false AzureCanvasBackend: skia AzureContentBackend: quartz AzureFallbackCanvasBackend: none AzureSkiaAccelerated: 0

Important Modified Preferences

accessibility.typeaheadfind.flashBar: 0 browser.cache.disk.capacity: 358400 browser.cache.disk.filesystem_reported: 1 browser.cache.disk.hashstats_reported: 1 browser.cache.disk.smart_size.first_run: false browser.cache.frecency_experiment: 3 true browser.places.smartBookmarksVersion: 7 browser.sessionstore.upgradeBackup.latestBuildID: 20160105164030 browser.startup.homepage_override.buildID: 20160105164030 browser.startup.homepage_override.mstone: 43.0.4 browser.urlbar.suggest.searches: true browser.urlbar.userMadeSearchSuggestionsChoice: true dom.apps.reset-permissions: true dom.mozApps.used: true extensions.lastAppVersion: 43.0.4 gfx.blacklist.direct2d: 3 gfx.crash-guard.glcontext.appVersion: 43.0.4 gfx.crash-guard.glcontext.deviceID: 0x0166 gfx.crash-guard.status.glcontext: 2 media.gmp-gmpopenh264.abi: x86_64-gcc3-u-i386-x86_64 media.gmp-gmpopenh264.lastUpdate: 1452555291 media.gmp-gmpopenh264.version: 1.5.3 media.gmp-manager.buildID: 20160105164030 media.gmp-manager.lastCheck: 1453566955 43 network.cookie.prefsMigrated: true network.predictor.cleaned-up: true places.database.lastMaintenance: 1452606749 places.history.expiration.transient_current_max_pages: 104858 plugin.disable_full_page_plugin_for_types: application/pdf plugin.importedState: true privacy.sanitize.migrateFx3Prefs: true privacy.sanitize.timeSpan: 0 storage.vacuum.last.index: 1 storage.vacuum.last.places.sqlite: 1452606749

Important Locked Preferences


Incremental GC: true


Activated: false Prevent Accessibility: 0

Library Versions

NSPR Expected minimum version: 4.10.10 Version in use: 4.10.10

NSS Expected minimum version: 3.20.2 Basic ECC Version in use: 3.20.2 Basic ECC

NSSSMIME Expected minimum version: 3.20.2 Basic ECC Version in use: 3.20.2 Basic ECC

NSSSSL Expected minimum version: 3.20.2 Basic ECC Version in use: 3.20.2 Basic ECC

NSSUTIL Expected minimum version: 3.20.2 Version in use: 3.20.2

Experimental Features



Signature libsystem_kernel.dylib

RapportUtil1.dylib = Rapport

libsystem_pthread.dylib =  ? Word for Mac


libsystem_c.dylib = ? Word for Mac

libdispatch.dylib =  ? Word for Mac


libsystem_notify.dylib = unknown


libsystem_platform.dylib = unknown

libGL.dylib = unknown

libsystem_kernel.dylib =  ? Word for Mac


This is for Sumo's Related Bugs 1237957 RESOLVED DUPLICATE GLContext is disabled due to a previous crash

Disable / update Rapport

Try to disable WebGL by setting webgl.disabled to false true on the about:config page.

You can open the about:config page via the location/address bar. You can accept the warning and click "I'll be careful" to continue.

cor-el மூலமாக திருத்தப்பட்டது

It's already set to false.

Do you mean set it to true?


Yes, that should be true to disable WebGL. Sorry for the confusion.

Did you try that?

Hi, no the problem still persists.

I can't even shut down my laptop after I've quit Firefox, I have to use the power off button.

I want you to try this. Start the computer normally. Let it run itself for a few minutes so that everything gets loaded. After, shut it down.

Start your Computer in safe mode with networking. Then start Firefox. Try Safe web sites. Is the problem still there?

Starting The Computer In Safe Mode;
Free Online Encyclopedia

No, the problem isn't there in Safe Mode. Firefox quits normally.


Did you already update to Firefox 44.0?

Do you have security software on your Mac that could cause this issue?

Updating now, I don't have any security software installed.

I am having the same problem. It usually occurs only after Firefox has just been updated. After holding the power button on my Mac (to force a shutdown), I can bring Firefox back up and it will shutdown correctly.

Kneale said

I don't have any security software installed.

That is very dangerous. Many websites have been infected over the years.