Thunderbird Community Forum

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" : [
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   "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"
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   "source" : "P",
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   "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:

It appears that when I invert the sorting order of messages by Date, it does not affect the order of messages in a threaded conversation.

Is this deliberate or a known issue?

Any solution to sort everything with the newest messages at the top, that is: - Messages - And messages within a thread

Thanks!

I downloaded the version on the site but I can't get it to accept my password all I get each time is this at the top of the box

Component returned failure code: 0x804b000a (NS_ERROR_MALFORMED_URI) [nsIIOService.newURI]

Just how am I supposed to understand what that means. I would be grateful for any help you can give I've been using Thunderbird for over 25 years without any problems, I had to reinstall Windows and now I've got this problem.

What I see When I reply to an email written in classic Outlook for Windows, the quoted Outlook text gets a big gap above and below every single line, and its font changes. This happens as soon as Thunderbird processes such a message again, for example when I view my sent reply, reply to my own reply, forward it, or reopen a saved draft. Thunderbird users who receive my replies should see the same gaps.

Why it happens (as far as I can tell) - Outlook writes every line as its own paragraph and relies on a small style rule that says "no extra space between paragraphs". - Since version 151, Thunderbird puts the quoted email's style rules into a protective container (`@scope`) so they cannot change my own text (bug 1967725). - Thunderbird's own safety filter for HTML emails treats this container as a suspicious rule and deletes it, together with everything inside it. The "no extra space" rule is lost, and the gaps appear. - Older versions such as Thunderbird 140 ESR don't understand the container at all and ignore the rules even in the first reply.

In short: one Thunderbird feature adds the container, another Thunderbird feature removes it again.

How to reproduce (no Outlook needed) The attached test message contains two quotes with the same spacing rule: quote A inside the container, quote B without it. In Thunderbird 155.0.1 quote A shows big gaps, while quote B stays tight.

What would help Keep protecting my own text from the quoted styles, but in a form that Thunderbird's own filter and older email programs don't remove, for example by limiting the quoted rules to the quote with an ordinary class name instead of `@scope`.

Technical pointers - Filter: pref `mail.html_sanitize.drop_conditional_css` (default true); `NoConditionalRules` in `stylesheet.rs` rejects `CssRule::Scope`. - Container: `QuoteSanitizer.sys.mjs` (Phase 2), called from `MsgComposeCommands.js`. - Tested with Thunderbird 155.0.1 on Windows 11.

Hello fellow Thunderbirds,

I have been using Thunderbird for years and had thousands of emails in quite a few folders, with a shit-tonne of filters etc. My emails were running pretty well. I only use two addresses, but the folders help manage everything.

I just got a new computer last week. Prior to switching over to the new computer I read through the 'Export your Thunderbird Profile' help page, and the 'Move Thunderbird data to a new computer' pages. I've tried to follow all the info there (with a glitch, explained below).

I am using a Windows system and have gone from Win10 to Win11.

I have the following data:

• Mozilla Maintenance Service (in Program Files (x86) ).
• Mozilla Thunderbird (in Program Files (x86) )
• Thunderbird (In Users/Username/AppData/Local/Thunderbird) (Contains 'profile' and 'updates'

I tried to swap the above data into the same spots on the new computer, but alas, it's not working. I *may*, however, have fucked it up myself...

So... When I got the new computer, I immediately downloaded Firefox, but, alas, I entered my email's details before closing it down. It did download a few off the server, but only a day's worth (before I realised I screwed up).

As soon as I realised I'd mucked up, I uninstalled Thunderbird and deleted the files on the new computer (you know how when you download it doesn't always remove all the stuff, so I tried to do this).

I reinstalled Thunderbird, but closed it prior to loading the email addresses on (as instructed). I then transferred all the above data into the corresponding file areas on the new computer. However, everytime I try to run the program it just goes to the standard open screen (with the popup that prompts you to enter your email addresses and details into it - see image, below, in case I'm not explaining it right).

Anyway, I'd appreciate any help you might be able to give me as I'm desperate to get my emails running again and have access to all the saved emails which were in my system. Kindly. Larysa.

I updated to 155.0.1 via the update modal yesterday, on MacOS Tahoe, and it didn't restart as normal. The main message pane was blank with "No Message Found" (screenshot attached).

I tried installing a fresh 155.0 over, that did not work; but, a restore of the prior app from my Time Machine did work -- that is, the application not the user profile data.

I just thought this was strange; never ran into it.

If there is an issue and I can help test it usefully, I happy to do so (I have backups! LOL).

Forrest

hi, i am trying to remove an email account from Thunderbird app that i added but the "Delete" button in account settings isn't working at all! when i click it nothing happens. i select the account but when i click the delete button nothing happens

For the past 3-4 days, I am unable to successfully add my Yahoo New Mail account to Thunderbird.

The app says it cannot authenticate my account, but Yahoo confirms Thunderbird's access.

I'm using Thunderbird Version 155.0.1 (64-bit). I reinstalled it after cleaning the installation of Windows 11 25H2 a few days ago.

Please help. I need to move all my Gmail messages to Yahoo, and Thunderbird is the only option I have.

Thank you in advance!

Thunderbird comes up as not responding - tab names appear but he last tab is constantly trying to open. This began about 2.00pm Tuesday 15th September. Shutting down & restarting has no effect - please help!! Brian

Hello Thunderbird community,

I have released Easy Table Editor by Cardella, a free and open-source extension created to make HTML table editing easier inside Thunderbird's message composer.

The extension adds a table editor directly beside the message formatting controls and includes:

• Mouse-drag selection of multiple cells • Simultaneous formatting of selected cells • Column and row resizing with the mouse • Row and column insertion or removal • Cell merging and splitting • Header-cell conversion • Text, background, border and alignment controls • Clean, modern table templates • The ability to save the current table as a reusable model • Interface localization in ten languages

The extension works locally. It does not use analytics, tracking, external servers or remote resources. Saved table models remain in Thunderbird's local storage.

Thunderbird Add-ons page: https://addons.thunderbird.net/thunderbird/addon/easy-table-editor-by-cardella/

Compatibility: Thunderbird 151 or newer.

This is a personal and independent project. I would appreciate feedback from the community, especially about usability, compatibility and features that would make HTML table editing better.

Thank you! Henrique Cardella

In TB prior to v.155, folder message counts were not shown at all if the respective folders were empty. That is, instead of showing "0", TB did not show anything.

Now, after updating to TB v.155.0.1, I see dashes (horizontal lines) in the folder tree to the right of each empty folder.

Is it possible to revert back to the original behaviour and get rid of those unsightly dashes? They only add visual clutter (my opinion, obviously) while not providing any extra information.

Thanks.

Noticed in LM, the last couple Tbird versions, the context menu doesn't close, when click anywhere on active window, away from the context menu. Happens if R click a message in thread pane, or pretty much anywhere else that R clicking opens a menu.

• Only* hitting Esc key closes it.

Could be a profile issue? (but isn't due to theme used in Tbird - tested several, incl. native w/ Tb package).

Normally, opening a context menu, then L clicking anywhere inside the active window, closes the context menu (how it works in Firefox).

Also, opening a context in Tbird (if don't close it), switch to another app, the Tbird context menu shows on top that app.

I've been using Thunderbird version 155.0 with only a few issues (reported in other posts).

To investigate one of the issues I've had to create a new profile for testing. I've managed to set everything up except for my default font for outgoing emails. If I send an email with say, four lines of text, I can format each line to be a different font and the received email reflects the different fonts for each line.

But Thunderbird isn't remembering the last selected font. So if I send a second email (without re-selecting any font) the recipient receives it in some naff mono-spaced font. I guess there's somewhere where I can set up the default font for my outgoing emails but I haven't managed to find it yet. Can anyone help?

Anyone know how to use the new setting "mail.addr_book.add_item_default_uri" in 155? The default value is a URI, "jsaddrbook://abook.sqlite", how do I figure out the URI of an alternative? I want to point it to my CardDAV server, do I just set it to the CardDAV URL?

I created a POP3 account, and no SMTP config was crested in Thunderbird. So, I tried the Add option and after filling the form the line still did not get created. Current TB version, Win 11 Pro. I have several other accounts that configured OK, all Spectrum.

Hello forum,

I have 2 mail addresses at gmx.de. I can’t sign up for either of them for a few days. I get the note: password wrong. I use the same password for both email addresses. I can sign in to both addresses via the browser at GMX, but not in the Thunderbird that I have been using for years. I have always called the two e-mail addresses via Thunderbird. I can't explain a reason for this problem. I hope that's from any of you.

Greetings Dieter