Diễn đàn hỗ trợ Firefox

I need help with MacOS Sequoia 15.8.1 (24H32).

Since yesterday’s update to 15.8, Firefox and Thunderbird no longer work—regardless of the build or version. The system immediately terminates the apps with this message in the Apple error report:

System Integrity Protection: enabled Crashed Thread: 0 MainThread Dispatch queue: com.apple.main-thread Exception Type: EXC_GUARD (SIGKILL) Exception Codes: GUARD_TYPE_MACH_PORT Exception Codes: 0x0000000000000203, 0x0000000000000000 Termination Reason: Namespace GUARD, Code 2305843146652647939

Translated with DeepL.com (free version)

Anyone succeed with running Firefox in headless mode under Ubuntu?

I tried:

firefox --headless --safe-mode -P headless https://quan.hoabinh.vn

but got this error:

[12545] Sandbox: CanCreateUserNamespace() unshare(CLONE_NEWPID): EPERM

• • • You are running in headless mode.

[GFX1-]: RenderCompositorSWGL failed mapping default framebuffer, no dt

I installed Firefox as from "https://packages.mozilla.org/apt" repo.

Overnight firefox doesn't launch anymore.

I have firefox installed via Software Manager flatpak (official Mozilla version) but it doesn't launch anymore. Clicking launch does nothing. Version is 156.0

I tried to launch the program in safe mode via console but it straight up doesn't find it?

I would love to add troubleshooting info but I can't actually get to it. I assume an update broke something but no idea how to solve this, can I go to an earlier version?

I updated my Mac to macOS Golden Gate. Tried to update Firefox from a non-admin account. It failed. Went to admin account, deleted Firefox and reinstalled from a new dmg download. All fine in the admin account. But the non-admin account (where I work day to day) won't even launch a Firefox window. It asks for admin access to install a helper. I can't see why it needs this but have given it via username and password, but it still doesn't launch. The dock icon says "Running in Background" when I hover over Firefox and the icon bounces. But no browser window

when I went to turn on Firefox this evening, the icon was gone and there was no access to Firefox. The only way I could access the internet was through Safari, which I otherwise never use. This happened 2 or 3 weeks ago but, that time, I was able to find the icon. This time that is not the case.

Firefox stopped working yesterday. When I open it, it immediately crashes. After multiple times of that I refreshed it as it asked. It then worked ok. However after closing it and coming back later, it again immediately crashes. I then tried uninstalling and reinstalling, but it still does not work.

I am not able to open my Firefox browser tonight. It was work yesterday. WHen I tried to refresh it the wheel kept spinning for over 15 min and there was no sign that it would complete the process.

I don't use Firefox daily, so not sure exactly when it last opened ok on my iMac (26.5.2). So I downloaded Version=153.0.1 BuildID=20260727124451, and tried again. When attempting to launch, the icon in the dock bounced a few times, then nothing. When repeated, it only bounces once.

Likely unrelated, but I had very recently upgraded my LuLu app (4.4.3) from Objective-See. It monitors outbound connections. But disabling the app changes nothing.

I'm not a MacOS guru. I expect there is an error in a log file somewhere that reveals the problem, but I don't know where to look.

Suggestions?

Firefox keeps crashig upon start-up. The tab stays open but it just says not responding.

I've tried deleting, and re-downloading, changing settings, changing and deleting profiles through profile manager. Troubleshoot doesn’t work and neither does refresh.

Other browsing apps work just fine, it's just firefox. I only had one add-on, which was AdGuard AdBlocker.

I hadn't done anything that I'm aware of, hadn't touched any settings and only had a max of 3 tabs open at a time.

I don't really know what else I can try anymore.

Multiple attempts to open Firefox produced a popup window indicating that "platform version 153.0 is not compatible with min version 152.0.6 max version 152.0.6 Maybe try to reinstall Firefox." If this is the only solution, how do I do this and retain my bookmarks, themes, etc profile? Thank you.

Julian H. Ethridge [email removed]@frontier.com

ExitException[ 3]javax.net.ssl.SSLHandshakeException: Received fatal alert: handshake_failure at sun.plugin2.applet.JNLP2Manager.downloadResources(Unknown Source) at sun.plugin2.applet.JNLP2Manager.prepareLaunchFile(Unknown Source) at sun.plugin2.applet.JNLP2Manager.loadJarFiles(Unknown Source) at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source) at java.lang.Thread.run(Unknown Source)

I wanted to refresh Firefox. When I downloaded the installer from the Mozilla website, I got this message: "Firefox is already running, but is not responding. The old Firefox process must be closed to open a new window." I finally downlaoded it from the App store and now I get this message "Your Firefox profile cannot be loaded. It may be missing or inaccessible."

I can't recollect doing anything lately that would have caused such a problem. I don't mess with the registry, and I don't use rogue programs. I do have a Surfshark VPN, which I disabled to download the latest version of Firefox.

I am running Windows 11 on a Dell PC, which is about 6 months old.

I didn't have any problems until reciently.

How can I fix this?

After an update minutes ago, Firefox immediately crashes on startup and crash reporter launches Rebooted computer. Launched firefox from command line with -safe-mode and -purgecaches

This is when the online help says to submit a report with the most recent bp-numbers. Thanks in advance for your assistance.

bp-2bd5243a-ff3d-4ea2-b0a2-ffb3d0260425 bp-28b30366-d7c1-46be-bc6b-1795a0260425 bp-e2aaa702-1190-4237-8ab3-7e5590260425 bp-93e9888c-569d-4148-b549-d97530260425 bp-d598e83a-3a9b-4874-b65a-ec7980260425

After the latest version was updated, Version 149.00.7, on my laptop, on 27 March 2026, the browser closed midway while I was working, and now I can no longer access Firefox.

When I click on the Icon to access I keep getting the following error message as per the attachment:

I have uninstalled Firefox and re-installed it THREE TIMES already', but I still get the same error as before, as per the screen print provided.

I have even tried to install Firefox with custom settings, but then in order to proceed with the installation the ONLY button to proceed was the "UPGRADE" option.

I am at my wits end because this is totally unacceptable and the updated version obviously DOES NOT WORK!!!

Your urgent attention and prompt action in sorting this out will be appreciated, thanks.

Hettie