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Unable to open Firefox on Big Sur

  • 2 replies
  • 1 has this problem
  • Last reply by Ken Creary

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Firefox fails to load with the following details:

Process: firefox [26134] Path: /Applications/ Identifier: org.mozilla.firefox Version: 88.0 (8821.4.15) Code Type: X86-64 (Native) Parent Process:  ??? [1] Responsible: firefox [26134] User ID: 501

Date/Time: 2021-04-30 07:09:53.948 -0400 OS Version: macOS 11.2.3 (20D91) Report Version: 12 Anonymous UUID: 28F22F8D-3DA5-6790-CE30-0EA497DB9F8E

Sleep/Wake UUID: 275B7F58-1F53-4F13-B662-AC22B471CDC1

Time Awake Since Boot: 480000 seconds Time Since Wake: 2600 seconds

System Integrity Protection: enabled

Crashed Thread: 0

Exception Type: EXC_CRASH (SIGABRT) Exception Codes: 0x0000000000000000, 0x0000000000000000 Exception Note: EXC_CORPSE_NOTIFY

Termination Reason: DYLD, [0x1] Library missing

Application Specific Information: dyld: launch, loading dependent libraries

Dyld Error Message:

 dyld: Using shared cache: 52762DF1-0E55-3F8B-9588-8169E6D0EB95

Library not loaded: @executable_path/libmozglue.dylib

 Referenced from: /Applications/
 Reason: no suitable image found.  Did find:

/Applications/ open() failed with errno=1 /Applications/ open() failed with errno=1 /Applications/ stat() failed with errno=1

Binary Images:

      0x1019f7000 -        0x1019f9fff +org.mozilla.firefox (88.0 - 8821.4.15) <72B39733-5449-3E84-9543-19F83BF995E0> /Applications/
      0x1030bc000 -        0x103157fff  dyld (832.7.3) <0D4EA85F-7E30-338B-9215-314A5A5539B6> /usr/lib/dyld
   0x7fff202f3000 -     0x7fff2032bfff  libobjc.A.dylib (818.2) <EB6B543F-D42C-3FB2-A2EC-43407C5F80D3> /usr/lib/libobjc.A.dylib
   0x7fff2cce5000 -     0x7fff2ce15fff (1.14 - 1.14) <8E53C25F-9FE2-372E-8374-6A598D72C4C1> /System/Library/Frameworks/AudioToolbox.framework/Versions/A/AudioToolbox
   0x7fff350e8000 -     0x7fff350ebfff (6.11 - 23) <B0F6AF8E-B85C-3C5C-9812-9CD8BC07ADB2> /System/Library/Frameworks/Cocoa.framework/Versions/A/Cocoa
   0x7fff3c619000 -     0x7fff3c61cfff (1.5 - 14) <30D9F433-5B2B-3B3F-9822-C150CDEA23E2> /System/Library/Frameworks/ExceptionHandling.framework/Versions/A/ExceptionHandling

Model: iMac18,2, BootROM 429., 4 processors, Quad-Core Intel Core i7, 3.6 GHz, 16 GB, SMC 2.40f1 Graphics: kHW_AMDRadeonPro560Item, Radeon Pro 560, spdisplays_pcie_device, 4 GB Memory Module: BANK 0/DIMM0, 8 GB, DDR4 SO-DIMM, 2400 MHz, 0x80AD, 0x484D413831475336414652384E2D554820202020 Memory Module: BANK 1/DIMM0, 8 GB, DDR4 SO-DIMM, 2400 MHz, 0x80AD, 0x484D413831475336414652384E2D554820202020 AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x16E), Broadcom BCM43xx 1.0 ( AirPortDriverBrcmNIC-1675.1) Bluetooth: Version 8.0.3d9, 3 services, 27 devices, 1 incoming serial ports Network Service: Ethernet, Ethernet, en0 Network Service: Wi-Fi, AirPort, en1 Serial ATA Device: APPLE HDD HTS541010A9E632, 1 TB USB Device: USB 3.0 Bus USB Device: Bluetooth USB Host Controller USB Device: FaceTime HD Camera (Built-in) USB Device: Apple USB SuperDrive USB Device: USB 2.0 Hub [MTT] USB Device: HD Pro Webcam C920 USB Device: My Book 25EE USB Device: Cyborg R.A.T.9 Wireless Mouse USB Device: USB to ATA/ATAPI bridge Thunderbolt Bus: iMac, Apple Inc., 41.4

Attached screenshots

All Replies (2)

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"org.mozilla.firefox (88.0 - 8821.4.15)"

try rolling back/downgrading to the previous FF version.

i think version 78 seems to be stable for most mac users.


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I don't think that will fix it. I have the same version running fine on another device on the same OS. Something on this machine is keeping the library from getting loaded. I'll keep searching...


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