why does my Firefox crash so many times?
Why does my Firefox keep crashing
Why does my Firefox keep crashing
Firefox on Android keeps crashing. This started happening about 2 weeks ago. The browser was updated about this time.
Tabs will crash over and over again. I can barely look at any given page for longer than a minute or two. What happened?? Firefox was never like this before. It just cras… (read more)
Tabs will crash over and over again. I can barely look at any given page for longer than a minute or two. What happened?? Firefox was never like this before. It just crashed in the middle of me typing this LMAO. Using Brave in the meantime. This is ridiculous.
Following my traumatic brain injury I do have a reading disability search that perusing your articles could take me up to a week. As you see I am running Windows 10 on a … (read more)
Following my traumatic brain injury I do have a reading disability search that perusing your articles could take me up to a week.
As you see I am running Windows 10 on a laptop which Microsoft said I was good for another year using this OS. Your latest download executed and after 2 reboots continuously crashes after trying to view any of the five windows a browser I had open with multiple tabs in each.
Running windows 11 Pro and in the last microsoft update my thunderbird email is not responding at all. It is trying to connect to imap.gmail.com. How can i turn off auto… (read more)
Running windows 11 Pro and in the last microsoft update my thunderbird email is not responding at all. It is trying to connect to imap.gmail.com.
How can i turn off auto account checking on startup so i can access my email settings to try and fix this?
I tried running it in safe mode and i get not responding there too! Can i access a profile folder and turn off auto email checking somehow?
After latest update firefox crashes constantly, won't sync bookmarks. Even now that I am trying to write on this page has crashed twice.
Firefox is crashing continuously, as in several times while I am trying to work on this computer.. 3 times now while I am trying to pay for items on a new page.
I run Thunderbird on MacOS for some years without a problem. Now, after a hard reboot, Thunderbird won't launch anymore. I tried reinstalling to no avail. Is there anythi… (read more)
I run Thunderbird on MacOS for some years without a problem. Now, after a hard reboot, Thunderbird won't launch anymore. I tried reinstalling to no avail. Is there anything I could do here? Or do you need any more info? The crash report is as follows:
Translated Report (Full Report Below)
Process: thunderbird [8297] Path: /Applications/Thunderbird.app/Contents/MacOS/thunderbird Identifier: org.mozilla.thunderbird Version: 155.0 (15526.8.28) Code Type: X86-64 (Native) Parent Process: launchd [1] User ID: 501
Date/Time: 2026-09-09 13:49:46.3562 +0200 OS Version: macOS 15.0.1 (24A348) Report Version: 12 Anonymous UUID: A83FED70-635C-4178-5B0E-2FB36A313750
Sleep/Wake UUID: 9CEF8430-EEF8-43BB-AC16-8A9FF7407F51
Time Awake Since Boot: 25000 seconds Time Since Wake: 7284 seconds
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
Thread 0 Crashed:: MainThread Dispatch queue: com.apple.main-thread 0 libsystem_kernel.dylib 0x7ff815680e0e mach_msg2_trap + 10 1 libsystem_kernel.dylib 0x7ff81568f622 mach_msg2_internal + 84 2 libsystem_kernel.dylib 0x7ff815687f16 mach_msg_overwrite + 649 3 libsystem_kernel.dylib 0x7ff8156810ff mach_msg + 19 4 XUL 0x2f9aca7f4 0x2f35dd000 + 105830388 5 XUL 0x2f9ac4183 0x2f35dd000 + 105804163 6 XUL 0x2f9ac2884 0x2f35dd000 + 105797764 7 XUL 0x2f865b45b 0x2f35dd000 + 84403291 8 XUL 0x2f8685615 0x2f35dd000 + 84575765 9 XUL 0x2f868d2af 0x2f35dd000 + 84607663 10 XUL 0x2f868d80f 0x2f35dd000 + 84609039 11 thunderbird 0x10d03ab2a 0x10d03a000 + 2858 12 dyld 0x7ff8153342cd start + 1805
Thread 1:: AsyncSignalControlThread 0 libsystem_kernel.dylib 0x7ff81568187a read + 10 1 XUL 0x2f825612a 0x2f35dd000 + 80187690 2 XUL 0x2f82560dd 0x2f35dd000 + 80187613 3 libsystem_pthread.dylib 0x7ff8156c2253 _pthread_start + 99 4 libsystem_pthread.dylib 0x7ff8156bdbef thread_start + 15
Thread 2:: RegisterFonts 0 CoreFoundation 0x7ff81573a759 CFStringGetCharacters + 98 1 CoreFoundation 0x7ff815803d71 CFURLCreateFilePathURL + 1086 2 libFontRegistry.dylib 0x7ff81e9c2201 TLocalFontRegistryImp::RegisterFont(__CFURL const*, __CFDictionary const*, unsigned int, unsigned int, __CFError**) const + 459 3 libFontRegistry.dylib 0x7ff81e9c2c32 TLocalFontRegistryImp::RegisterFonts(__CFArray const*, __CFDictionary const*, unsigned int, unsigned int, __CFArray const**, __CFArray const**, __CFArray const**) const + 182 4 libFontRegistry.dylib 0x7ff81e9de0ff XTRegisterFonts2 + 701 5 CoreText 0x7ff817d6db29 _CTFontManagerRegisterActionFontsForURLs(__CFArray const*, CTFontManagerScope, bool, Action, __CFArray const**) + 339 6 CoreText 0x7ff817d6eef7 _CTFontManagerRegisterActionFontURLs(__CFArray const*, CTFontManagerScope, bool, Action, URLTrust, __CFArray const*, bool (__CFArray const*, bool) block_pointer) + 42 7 XUL 0x2f4b40609 0x2f35dd000 + 22427145 8 XUL 0x2f4b5deba 0x2f35dd000 + 22548154 9 libnss3.dylib 0x2da8bb369 0x2da709000 + 1778537 10 libsystem_pthread.dylib 0x7ff8156c2253 _pthread_start + 99 11 libsystem_pthread.dylib 0x7ff8156bdbef thread_start + 15
Thread 3: 0 libsystem_pthread.dylib 0x7ff8156bdbcc start_wqthread + 0
Thread 4: 0 libsystem_kernel.dylib 0x7ff815680e0e mach_msg2_trap + 10 1 libsystem_kernel.dylib 0x7ff81568f622 mach_msg2_internal + 84 2 libsystem_kernel.dylib 0x7ff815687f16 mach_msg_overwrite + 649 3 libsystem_kernel.dylib 0x7ff8156810ff mach_msg + 19 4 XUL 0x2f9aca16d 0x2f35dd000 + 105828717 5 XUL 0x2f9acaeac 0x2f35dd000 + 105832108 6 XUL 0x2f9acad91 0x2f35dd000 + 105831825 7 XUL 0x2fb206fa9 0x2f35dd000 + 130195369 8 libsystem_pthread.dylib 0x7ff8156c2253 _pthread_start + 99 9 libsystem_pthread.dylib 0x7ff8156bdbef thread_start + 15
Thread 5: 0 libsystem_pthread.dylib 0x7ff8156bdbcc start_wqthread + 0
Thread 0 crashed with X86 Thread State (64-bit):
rax: 0x000000001000000a rbx: 0x00000002db928340 rcx: 0x00007ff7b2ec4af8 rdx: 0x0000003480000013 rdi: 0x00000002db928340 rsi: 0x0000000400000011 rbp: 0x00007ff7b2ec4b60 rsp: 0x00007ff7b2ec4af8 r8: 0x0000000000000000 r9: 0x0000000000000001 r10: 0x0000000000002303 r11: 0x0000000000000206 r12: 0x00000000000007d0 r13: 0x0000000400000011 r14: 0x0000000000000000 r15: 0x0000000000000001 rip: 0x00007ff815680e0e rfl: 0x0000000000000206 cr2: 0x0000000000000000
Logical CPU: 0 Error Code: 0x0100002f Trap Number: 133
Binary Images:
0x10d03a000 - 0x10d042fff org.mozilla.thunderbird (155.0) <4c4c4439-5555-3144-a100-2f79b5ba51e1> /Applications/Thunderbird.app/Contents/MacOS/thunderbird
0x10d168000 - 0x10d1dcfff libmozglue.dylib (*) <4c4c4442-5555-3144-a1b2-7d8d2d6587df> /Applications/Thunderbird.app/Contents/MacOS/libmozglue.dylib
0x10d077000 - 0x10d083fff com.apple.CoreWiFi (1.0) <c356ba94-c112-3326-9011-74fc0bb4dfde> /System/Library/PrivateFrameworks/CoreWiFi.framework/Versions/A/CoreWiFi
0x10d444000 - 0x10d5dffff CoreWiFiOld.dylib (*) <d5ce0007-36ac-37a1-a5d7-07ad7365e60a> /System/Library/PrivateFrameworks/CoreWiFi.framework/Versions/A/CoreWiFiOld.dylib
0x10d056000 - 0x10d057fff com.apple.IO80211 (1.0) <c0791260-3db4-30e8-962c-1d7a90bbe2d5> /System/Library/PrivateFrameworks/IO80211.framework/Versions/A/IO80211
0x10d061000 - 0x10d061fff com.apple.WiFiPeerToPeer (652.55.0) <6de18c87-b584-3fba-b9f2-5439ee94f3f7> /System/Library/PrivateFrameworks/WiFiPeerToPeer.framework/Versions/A/WiFiPeerToPeer
0x17689e000 - 0x1768f1fff IO80211Old.dylib (*) <d5ce0007-f5f4-3ab8-a256-05df5202823b> /System/Library/PrivateFrameworks/IO80211.framework/Versions/A/IO80211Old.dylib
0x1e640b000 - 0x1e6432fff WiFiPeerToPeerOld.dylib (*) <d5ce0007-9684-3a09-bf78-fb3a4f8bb7b1> /System/Library/PrivateFrameworks/WiFiPeerToPeer.framework/Versions/A/WiFiPeerToPeerOld.dylib
0x2da709000 - 0x2da9d5fff libnss3.dylib (*) <4c4c449b-5555-3144-a1ce-153a9242e9fd> /Applications/Thunderbird.app/Contents/MacOS/libnss3.dylib
0x2dbc97000 - 0x2dc767fff libgkcodecs.dylib (*) <4c4c4478-5555-3144-a176-a5710479f9c6> /Applications/Thunderbird.app/Contents/MacOS/libgkcodecs.dylib
0x10d400000 - 0x10d423fff liblgpllibs.dylib (*) <4c4c44b4-5555-3144-a1b9-b5c664969bb6> /Applications/Thunderbird.app/Contents/MacOS/liblgpllibs.dylib
0x10d06b000 - 0x10d06bfff com.apple.framework.CoreWLAN (16.0) <cf40012c-37ff-356e-863f-24c150978974> /System/Library/Frameworks/CoreWLAN.framework/Versions/A/CoreWLAN
0x25d475000 - 0x25d4effff CoreWLANOld.dylib (*) <d5ce0007-0117-3ddb-beb8-5886a5f8b758> /System/Library/Frameworks/CoreWLAN.framework/Versions/A/CoreWLANOld.dylib
0x2f35dd000 - 0x2fe8e2fff XUL (*) <4c4c44ee-5555-3144-a15b-7a3b6ab61736> /Applications/Thunderbird.app/Contents/MacOS/XUL
0x10d42f000 - 0x10d430fff org.mozilla.channelprefs (1.0) <4c4c4410-5555-3144-a148-95c735c87f29> /Applications/Thunderbird.app/Contents/Frameworks/ChannelPrefs.framework/ChannelPrefs
0x7ff815680000 - 0x7ff8156bbfff libsystem_kernel.dylib (*) <10094a6c-fa57-367f-b06e-7c449ea31285> /usr/lib/system/libsystem_kernel.dylib
0x7ff81532e000 - 0x7ff8153ba32f dyld (*) <69c73748-37ae-3a6f-83af-690645c3da75> /usr/lib/dyld
0x0 - 0xffffffffffffffff ??? (*) <00000000-0000-0000-0000-000000000000> ???
0x7ff8156bc000 - 0x7ff8156c7fff libsystem_pthread.dylib (*) <c0db9cf9-86ec-31d4-a557-2c07945fd8f2> /usr/lib/system/libsystem_pthread.dylib
0x7ff81572b000 - 0x7ff815bcaff2 com.apple.CoreFoundation (6.9) <541c6f06-0abc-39f5-a7d2-3cad5db19c04> /System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation
0x7ff81e9af000 - 0x7ff81e9faff7 libFontRegistry.dylib (*) <31b7fceb-b146-3e8d-a297-87c67730f388> /System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks/ATS.framework/Versions/A/Resources/libFontRegistry.dylib
0x7ff817c31000 - 0x7ff817e51ff5 com.apple.CoreText (841.0.0.1) <c3eb23cc-fc68-312e-bc9d-8e28a4a44da3> /System/Library/Frameworks/CoreText.framework/Versions/A/CoreText
External Modification Summary:
Calls made by other processes targeting this process: task_for_pid: 0 thread_create: 0 thread_set_state: 0 Calls made by this process: task_for_pid: 0 thread_create: 0 thread_set_state: 0 Calls made by all processes on this machine: task_for_pid: 0 thread_create: 0 thread_set_state: 0
VM Region Summary: ReadOnly portion of Libraries: Total=1.3G resident=0K(0%) swapped_out_or_unallocated=1.3G(100%) Writable regions: Total=7.6G written=0K(0%) resident=0K(0%) swapped_out=0K(0%) unallocated=7.6G(100%)
VIRTUAL REGION
REGION TYPE SIZE COUNT (non-coalesced)
Activity Tracing 256K 1 Kernel Alloc Once 8K 1 MALLOC 550.1M 21 MALLOC guard page 24K 6 STACK GUARD 56.0M 6 Stack 12.0M 6 VM_ALLOCATE 132.0M 18 VM_ALLOCATE (reserved) 7.1G 10 reserved VM address space (unallocated) __CTF 824 1 __DATA 30.4M 877 __DATA_CONST 95.2M 881 __DATA_DIRTY 2560K 333 __FONT_DATA 2352 1 __INFO_FILTER 8 1 __LINKEDIT 186.2M 17 __OBJC_RO 76.1M 1 __OBJC_RW 2354K 2 __TEXT 1.1G 902 __TPRO_CONST 272K 2 dsce.got 124K 1 dyld private memory 512K 2 mapped file 53.2M 51 owned unmapped memory 20K 1 shared memory 1124K 9
TOTAL 9.4G 3151 TOTAL, minus reserved VM space 2.3G 3151
Full Report
{"app_name":"thunderbird","timestamp":"2026-09-09 13:49:48.00 +0200","app_version":"155.0","sroute_id":12,"slice_uuid":"4c4c4439-5555-3144-a100-2f79b5ba51e1","build_version":"15526.8.28","platform":1,"bundleID":"org.mozilla.thunderbird","share_with_app_devs":0,"is_first_party":0,"bug_type":"309","os_version":"macOS 15.0.1 (24A348)","roots_installed":0,"name":"thunderbird","incident_id":"D8368554-B699-4AD8-A8A6-2C4175E89A69"} {
"uptime" : 25000,
"procRole" : "Background",
"version" : 2,
"userID" : 501,
"deployVersion" : 210,
"modelCode" : "MacBookPro15,2",
"coalitionID" : 1356,
"osVersion" : {
"train" : "macOS 15.0.1",
"build" : "24A348",
"releaseType" : "User"
},
"captureTime" : "2026-09-09 13:49:46.3562 +0200",
"codeSigningMonitor" : 0,
"incident" : "D8368554-B699-4AD8-A8A6-2C4175E89A69",
"pid" : 8297,
"cpuType" : "X86-64",
"roots_installed" : 0,
"bug_type" : "309",
"procLaunch" : "2026-09-09 13:49:45.0052 +0200",
"procStartAbsTime" : 25995372141555,
"procExitAbsTime" : 25996722299153,
"procName" : "thunderbird",
"procPath" : "\/Applications\/Thunderbird.app\/Contents\/MacOS\/thunderbird",
"bundleInfo" : {"CFBundleShortVersionString":"155.0","CFBundleVersion":"15526.8.28","CFBundleIdentifier":"org.mozilla.thunderbird"},
"storeInfo" : {"deviceIdentifierForVendor":"1F778C59-C2BF-597B-B4D7-068A27420DA1","thirdParty":true},
"parentProc" : "launchd",
"parentPid" : 1,
"coalitionName" : "org.mozilla.thunderbird",
"crashReporterKey" : "A83FED70-635C-4178-5B0E-2FB36A313750",
"codeSigningID" : "org.mozilla.thunderbird",
"codeSigningTeamID" : "",
"codeSigningFlags" : 570490881,
"codeSigningValidationCategory" : 1,
"codeSigningTrustLevel" : 4294967295,
"bootSessionUUID" : "3B94A2DF-4DD0-4B72-9BCF-22A7621B9373",
"wakeTime" : 7284,
"sleepWakeUUID" : "9CEF8430-EEF8-43BB-AC16-8A9FF7407F51",
"sip" : "enabled",
"sroute_id" : 12,
"exception" : {"port":515,"signal":"SIGKILL","guardId":0,"codes":"0x0000000000000203, 0x0000000000000000","violations":["ILLEGAL_MOVE"],"message":" ILLEGAL_MOVE on mach port 515 (guarded with 0x0000000000000000)","subtype":"GUARD_TYPE_MACH_PORT","type":"EXC_GUARD","rawCodes":[515,0]},
"termination" : {"namespace":"GUARD","flags":2,"code":2305843146652647939},
"extMods" : {"caller":{"thread_create":0,"thread_set_state":0,"task_for_pid":0},"system":{"thread_create":0,"thread_set_state":0,"task_for_pid":0},"targeted":{"thread_create":0,"thread_set_state":0,"task_for_pid":0},"warnings":0},
"faultingThread" : 0,
"threads" : 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"usedImages" : [
{
"source" : "P",
"arch" : "x86_64",
"base" : 4513308672,
"CFBundleShortVersionString" : "155.0",
"CFBundleIdentifier" : "org.mozilla.thunderbird",
"size" : 36864,
"uuid" : "4c4c4439-5555-3144-a100-2f79b5ba51e1",
"path" : "\/Applications\/Thunderbird.app\/Contents\/MacOS\/thunderbird",
"name" : "thunderbird",
"CFBundleVersion" : "15526.8.28"
},
{
"source" : "P",
"arch" : "x86_64",
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Model: MacBookPro15,2, BootROM 2022.100.22.0.0, 4 processors, Quad-Core Intel Core i7, 2,11 GHz, 32 GB, SMC Graphics: Intel HD Graphics 620, Intel HD Graphics 620, Built-In Display: Unknown Display, 2048 x 1152, Main, MirrorOff, Online Memory Module: BANK 0/ChannelA-DIMM0, 16 GB, DDR4, 2400 MHz, SK Hynix, HMA82GS6AFR8N-UH Memory Module: BANK 2/ChannelB-DIMM0, 16 GB, DDR4, 2400 MHz, SK Hynix, HMA82GS6AFR8N-UH AirPort: spairport_wireless_card_type_wifi (0x14E4, 0x117), Broadcom BCM43xx 1.0 (7.77.111.1 AirPortDriverBrcmNIC-1772.1) AirPort: Bluetooth: Version (null), 0 services, 0 devices, 0 incoming serial ports Network Service: Wi-Fi, AirPort, en1 PCI Card: Intel HD Graphics 620, VGA compatible controller, Internal@0,2,0 PCI Card: Sunrise Point-LP HD Audio, Audio device, Internal@0,31,3 USB Device: USB30Bus USB Device: USB3.0-CRW USB Device: vendor_device USB Device: Integrated Camera USB Device: BRCM20702 Hub USB Device: Bluetooth USB Host Controller Thunderbolt Bus:
I've had a request from Mozilla to provide the Summaries of 2 recent crashes, bur I don't know where to start looking to find them (Sorry) Cheers Pete Smith
why do my tabs keep crashing
I wonder if the problem is that I have not connected to Firefox. I am on Windows 11.
Hi my firefox just updated to version 153.0.1 on all 5 family computers some running win 11 and some win 10 and 2 win 11 pro. now we all experience firefox crashing and n… (read more)
Hi my firefox just updated to version 153.0.1 on all 5 family computers some running win 11 and some win 10 and 2 win 11 pro. now we all experience firefox crashing and not loading pages. When we go to settings and select contact support it says the system crashed. Is there a way to roll back to a version that works without crashing without have to revert to goggle chrome or edge? regards Mal
I usually use firefox to download things, and watch videos, however, sometimes, when I change tabs, try to minimise firefox, close a pop up, even if I just pause a video,… (read more)
I usually use firefox to download things, and watch videos, however, sometimes, when I change tabs, try to minimise firefox, close a pop up, even if I just pause a video, it randomly decides to instead completely freeze and require the app to be completely restarted, and it occasionally decides to roll back my search history.
In fact, Firefox crashed as I was writing this, i'm lucky my progress was saved, these issues have made firefox completely unusable about 70%-80% of the time, and i'm running out of browsers to switch to, opera is run on lies, chrome is just bad, and now firefox is dying.
Just for reference, no other application or web browser that has ever been on my current device has ever acted like this, I'm currently using a decent PC running Windows 10
After the most recent Thunderbird app update from Google play, the Thunderbird app crashes instantly and constantly on start up. I did restart, uninstall, reinstall, OS u… (read more)
After the most recent Thunderbird app update from Google play, the Thunderbird app crashes instantly and constantly on start up. I did restart, uninstall, reinstall, OS update, clear cache, smart clean and still the Thunderbird app crashes instantly on start up. The screen will flash a few times as the app attempts to start. But instantly a window pops up saying the app has unfortunately shutdown. I am at witts end. I have been using Thunderbird for years. Never had this happen before. Anyone have any ideas? Google suggests getting hold of Mozilla support because this is becoming an on going issue. Please help.
Hello, Firefox keeps crashing numerous times everyday, I've just uninstalled it then reinstalled it and within minutes another notification it's crashed, works fine on my… (read more)
Hello, Firefox keeps crashing numerous times everyday, I've just uninstalled it then reinstalled it and within minutes another notification it's crashed, works fine on my pc and been using it for years.
Mail.com support recommended that I install Thunderbird to clean out my inbox. Things went perfectly and I managed to delete 20,000. Then the app just STOPPED. It wouldn'… (read more)
Mail.com support recommended that I install Thunderbird to clean out my inbox. Things went perfectly and I managed to delete 20,000. Then the app just STOPPED. It wouldn't delete any more. I emptied my email's trash, restarted my phone twice, and cleared the cache several times. The app is just inoperable.
Please help! I have 265,000 more emails to delete.
I posted this earlier and the bot named David is trying to take over with ideas that don’t work. How do we stop it? I also posted from my own email and it tried to stop m… (read more)
I posted this earlier and the bot named David is trying to take over with ideas that don’t work. How do we stop it? I also posted from my own email and it tried to stop me.
As I write I am seriously considering walking away from using Firefox and advising all my friends to not use it. Every time a programme does a update on my desktop, whic… (read more)
As I write I am seriously considering walking away from using Firefox and advising all my friends to not use it.
Every time a programme does a update on my desktop, which is several times a week, it crashes Firefox and I get endless messages all day to keep rebooting Firefox.
It is getting extremely aggravating, frustrating and making me very annoyed.
This is supposed to be a modern browser with no big issues, supposedly easier to use than others? not on my desktop it is not and has not been for several months.
Please help me get past the opening screen for Thunderbird. The folder shows 72 messages, but I can't view them.
Firefox constantly not responding/crashing