Hmm, I only just now saw your reply. I never got an email alert that there was a new post!

So, it hasn't been working at all for a couple months.
I updated an hour ago to the OS X Monterey update (12.6.8). I closed Safari before starting the update so it would save my gobs of windows ~40+ and tabs. Unfortunately, when the update finally finished and restarted, I clicked on an email that opened a Safari window. So now I have Safari open again, with one single window. I always run fsck or Disk Utility > First Aid after updates, so I did that – completely forgetting about the open Safari window – so now I just lost all my previous windows and tabs.

So, after First Aid completes, I Restart again, open Safari, click on Session Restore extension icon and Boom! Suddenly it is now working. Autosave and manual saves. This is such a simple easy to use extension (and all the others in app store are either crap or abandoned) I wish it would work consistently.

If/when (I hope never) it becomes non-operational for me again, I will try deleting the 3 folders you recommended above.

Cheers,
Jeff

Well, this plugin is now useless for me. Too bad actually paid for it. I have to question whether it might be abandoned at this point. Too bad, it was a pretty nice little utility.

I have similar problem, but mine doesn't save anything, it closes the Safari extension dropdown bubble and then nothing. Trying to save from the app also does not save anything. App remains open but no auto-saves and forced saves don't actually save anything – not even a new entry in the Saved Sessions list.

I wonder if there's a max number of windows and/or tabs Session Restore can handle. I admittedly have a $hitload of both.

Last Auto-save: 2023/06/02, Last Forced Save: 2023/06/24
Restart or First Aid (fsck) no help.
MacOS Monterey 12.6.7, Safari 16.5.2, MBP M1 Pro

@SweetP I am still seeing the same problem with v2.6.7.1, and now restarting Safari (15.5) and SessionRestore app does not fix it, whereas before it worked for awhile after restarting those.

@SweetP And here is the "Full Report"

Jeff
–––––––

-----------
Full Report
-----------

{"app_name":"SessionRestore Extension","timestamp":"2022-06-10 12:46:51.00 -0700","app_version":"2.6.6","slice_uuid":"3db5dc8c-9134-38f3-bfca-989f3ddf6867","build_version":"2.6.6","platform":1,"bundleID":"com.sweetpproductions.SessionRestore.Extension","share_with_app_devs":0,"is_first_party":0,"bug_type":"309","os_version":"macOS 12.3.1 (21E258)","incident_id":"E3E2932A-CD1C-490A-816E-47B0584DD75A","name":"SessionRestore Extension"}
{
  "uptime" : 780000,
  "procLaunch" : "2022-06-10 12:16:48.7290 -0700",
  "procRole" : "Default",
  "version" : 2,
  "userID" : 501,
  "deployVersion" : 210,
  "modelCode" : "MacBookPro18,3",
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  "osVersion" : {
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    "build" : "21E258",
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  "captureTime" : "2022-06-10 12:46:49.5199 -0700",
  "incident" : "E3E2932A-CD1C-490A-816E-47B0584DD75A",
  "bug_type" : "309",
  "pid" : 74227,
  "procExitAbsTime" : 18881114779953,
  "translated" : false,
  "cpuType" : "ARM-64",
  "procName" : "SessionRestore Extension",
  "procPath" : "\/Applications\/SessionRestore.app\/Contents\/PlugIns\/SessionRestore Extension.appex\/Contents\/MacOS\/SessionRestore Extension",
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  "crashReporterKey" : "B1ABF8DE-2FB2-6133-268A-00EFCF9D3CEF",
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  "sip" : "enabled",
  "isCorpse" : 1,
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  "termination" : {"flags":0,"code":5,"namespace":"SIGNAL","indicator":"Trace\/BPT trap: 5","byProc":"exc handler","byPid":74227},
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@SweetP Sorry about the delay; for some reason, I never received notification of your response.

Latest (today) crash report attached.

Jeff
–––––––

-------------------------------------
Translated Report (Full Report Below)
-------------------------------------

Process:               SessionRestore Extension [74227]
Path:                  /Applications/SessionRestore.app/Contents/PlugIns/SessionRestore Extension.appex/Contents/MacOS/SessionRestore Extension
Identifier:            com.sweetpproductions.SessionRestore.Extension
Version:               2.6.6 (2.6.6)
Code Type:             ARM-64 (Native)
Parent Process:        launchd [1]
User ID:               501

Date/Time:             2022-06-10 12:46:49.5199 -0700
OS Version:            macOS 12.3.1 (21E258)
Report Version:        12
Anonymous UUID:        B1ABF8DE-2FB2-6133-268A-00EFCF9D3CEF

Sleep/Wake UUID:       7831293A-D1B5-4D0F-9220-698591224CF1

Time Awake Since Boot: 780000 seconds
Time Since Wake:       2218 seconds

System Integrity Protection: enabled

Crashed Thread:        2  Dispatch queue: com.apple.NSXPCConnection.user.endpoint

Exception Type:        EXC_BREAKPOINT (SIGTRAP)
Exception Codes:       0x0000000000000001, 0x00000001b4525514
Exception Note:        EXC_CORPSE_NOTIFY

Termination Reason:    Namespace SIGNAL, Code 5 Trace/BPT trap: 5
Terminating Process:   exc handler [74227]

Application Specific Backtrace 0:
0   CoreFoundation                      0x00000001b16cab08 __exceptionPreprocess + 240
1   libobjc.A.dylib                     0x00000001b1415e14 objc_exception_throw + 60
2   CoreFoundation                      0x00000001b179c384 -[__NSCFString characterAtIndex:].cold.1 + 0
3   CoreFoundation                      0x00000001b17a8fc8 -[__NSPlaceholderDictionary initWithCapacity:].cold.1 + 0
4   CoreFoundation                      0x00000001b15d1558 -[__NSPlaceholderDictionary initWithObjects:forKeys:count:] + 320
5   CoreFoundation                      0x00000001b15d13ec +[NSDictionary dictionaryWithObjects:forKeys:count:] + 60
6   SessionRestore Extension            0x000000010212d510 SessionRestore Extension + 21776
7   SessionRestore Extension            0x000000010212cdcc SessionRestore Extension + 19916
8   CoreFoundation                      0x00000001b162b684 __invoking___ + 148
9   CoreFoundation                      0x00000001b162b4fc -[NSInvocation invoke] + 468
10  Foundation                          0x00000001b24e2974 __NSXPCCONNECTION_IS_CALLING_OUT_TO_REPLY_BLOCK__ + 24
11  Foundation                          0x00000001b24e0f48 -[NSXPCConnection _decodeAndInvokeReplyBlockWithEvent:sequence:replyInfo:] + 572
12  Foundation                          0x00000001b24e08d8 __88-[NSXPCConnection _sendInvocation:orArguments:count:methodSignature:selector:withProxy:]_block_invoke_3 + 212
13  libxpc.dylib                        0x00000001b12b69d0 _xpc_connection_reply_callout + 124
14  libxpc.dylib                        0x00000001b12b68c0 _xpc_connection_call_reply_async + 88
15  libdispatch.dylib                   0x00000001b13ba248 _dispatch_client_callout3 + 20
16  libdispatch.dylib                   0x00000001b13d7c24 _dispatch_mach_msg_async_reply_invoke + 340
17  libdispatch.dylib                   0x00000001b13c1784 _dispatch_lane_serial_drain + 376
18  libdispatch.dylib                   0x00000001b13c2438 _dispatch_lane_invoke + 444
19  libdispatch.dylib                   0x00000001b13ccc98 _dispatch_workloop_worker_thread + 648
20  libsystem_pthread.dylib             0x00000001b157a360 _pthread_wqthread + 288
21  libsystem_pthread.dylib             0x00000001b1579080 start_wqthread + 8


Thread 0::  Dispatch queue: com.apple.main-thread
0   libsystem_kernel.dylib        	       0x1b15408d0 mach_msg_trap + 8
1   libsystem_kernel.dylib        	       0x1b1540d40 mach_msg + 76
2   CoreFoundation                	       0x1b164ac1c __CFRunLoopServiceMachPort + 372
3   CoreFoundation                	       0x1b16490cc __CFRunLoopRun + 1180
4   CoreFoundation                	       0x1b1648490 CFRunLoopRunSpecific + 600
5   HIToolbox                     	       0x1ba268dd8 RunCurrentEventLoopInMode + 292
6   HIToolbox                     	       0x1ba268b54 ReceiveNextEventCommon + 564
7   HIToolbox                     	       0x1ba268908 _BlockUntilNextEventMatchingListInModeWithFilter + 72
8   AppKit                        	       0x1b41a7b2c _DPSNextEvent + 860
9   AppKit                        	       0x1b41a6424 -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 1328
10  ViewBridge                    	       0x1b8985ecc __75-[NSViewServiceApplication nextEventMatchingMask:untilDate:inMode:dequeue:]_block_invoke + 140
11  ViewBridge                    	       0x1b8985cc8 -[NSViewServiceApplication _withToxicEventMonitorPerform:] + 160
12  ViewBridge                    	       0x1b897192c -[NSViewServiceApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 184
13  AppKit                        	       0x1b41985f0 -[NSApplication run] + 596
14  AppKit                        	       0x1b4169d08 NSApplicationMain + 1132
15  libxpc.dylib                  	       0x1b12bf928 _xpc_objc_main + 992
16  libxpc.dylib                  	       0x1b12bf1d0 xpc_main + 108
17  Foundation                    	       0x1b254720c -[NSXPCListener resume] + 344
18  PlugInKit                     	       0x1bcc432cc 0x1bcc26000 + 119500
19  PlugInKit                     	       0x1bcc42ef0 0x1bcc26000 + 118512
20  PlugInKit                     	       0x1bcc436d4 0x1bcc26000 + 120532
21  ExtensionFoundation           	       0x1c4084ec0 EXExtensionMain + 300
22  Foundation                    	       0x1b25b7950 NSExtensionMain + 240
23  dyld                          	       0x1024c1088 start + 516

Thread 1:: com.apple.NSEventThread
0   libsystem_kernel.dylib        	       0x1b15408d0 mach_msg_trap + 8
1   libsystem_kernel.dylib        	       0x1b1540d40 mach_msg + 76
2   CoreFoundation                	       0x1b164ac1c __CFRunLoopServiceMachPort + 372
3   CoreFoundation                	       0x1b16490cc __CFRunLoopRun + 1180
4   CoreFoundation                	       0x1b1648490 CFRunLoopRunSpecific + 600
5   AppKit                        	       0x1b43146f4 _NSEventThread + 196
6   libsystem_pthread.dylib       	       0x1b157e26c _pthread_start + 148
7   libsystem_pthread.dylib       	       0x1b157908c thread_start + 8

Thread 2 Crashed::  Dispatch queue: com.apple.NSXPCConnection.user.endpoint
0   AppKit                        	       0x1b4525514 -[NSApplication _crashOnException:] + 324
1   AppKit                        	       0x1b452550c -[NSApplication _crashOnException:] + 316
2   AppKit                        	       0x1b452522c -[NSApplication reportException:] + 580
3   AppKit                        	       0x1b45cf708 uncaughtErrorProc + 156
4   CoreFoundation                	       0x1b1756bac __handleUncaughtException + 676
5   libobjc.A.dylib               	       0x1b141e324 _objc_terminate() + 132
6   libc++abi.dylib               	       0x1b1537ea4 std::__terminate(void (*)()) + 20
7   libc++abi.dylib               	       0x1b1537e40 std::terminate() + 64
8   libdispatch.dylib             	       0x1b13ba25c _dispatch_client_callout3 + 40
9   libdispatch.dylib             	       0x1b13d7c24 _dispatch_mach_msg_async_reply_invoke + 340
10  libdispatch.dylib             	       0x1b13c1784 _dispatch_lane_serial_drain + 376
11  libdispatch.dylib             	       0x1b13c2438 _dispatch_lane_invoke + 444
12  libdispatch.dylib             	       0x1b13ccc98 _dispatch_workloop_worker_thread + 648
13  libsystem_pthread.dylib       	       0x1b157a360 _pthread_wqthread + 288
14  libsystem_pthread.dylib       	       0x1b1579080 start_wqthread + 8

Thread 3:
0   libsystem_pthread.dylib       	       0x1b1579078 start_wqthread + 0


Thread 2 crashed with ARM Thread State (64-bit):
    x0: 0x000000014281c000   x1: 0x000000016dd5b710   x2: 0x0000000000000004   x3: 0x000000014281c800
    x4: 0x00000000000000bc   x5: 0x000000016dd5b658   x6: 0x0000000000000005   x7: 0x00000001b18377dc
    x8: 0x00000002075cd000   x9: 0x69d7651bbff00067  x10: 0x0000000000000001  x11: 0x000000014281c8bc
   x12: 0x00000000fca02400  x13: 0x0000000000000002  x14: 0x000000000000fffd  x15: 0x0000000000000003
   x16: 0x0000000000000001  x17: 0x000000016dd5b888  x18: 0x0000000000000000  x19: 0x0000000141b288a0
   x20: 0x00000001fb643cce  x21: 0x0000000141d0bce0  x22: 0x00000001fb63e000  x23: 0x0000000209d0a000
   x24: 0x0000000141b296e0  x25: 0x0000000141b1d290  x26: 0x00000001fb63f399  x27: 0x00000001fb640d11
   x28: 0x00000001b1a6880c   fp: 0x000000016dd5c110   lr: 0x95138001b452550c
    sp: 0x000000016dd5c0c0   pc: 0x00000001b4525514 cpsr: 0x60001000
   far: 0x000000014281cc08  esr: 0xf2000001 (Breakpoint) brk 1

Binary Images:
       0x1b153f000 -        0x1b1576fff libsystem_kernel.dylib (*) <1d7b3b8e-75a1-34ea-aa52-9f7c23155c55> /usr/lib/system/libsystem_kernel.dylib
       0x1b15c6000 -        0x1b1b0bfff com.apple.CoreFoundation (6.9) <8e1809ff-f5b1-3d9e-be15-f2e7b1d8ce51> /System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation
       0x1ba235000 -        0x1ba568fff com.apple.HIToolbox (2.1.1) <4a1d1f30-c79d-3502-b51f-9792adbd8e06> /System/Library/Frameworks/Carbon.framework/Versions/A/Frameworks/HIToolbox.framework/Versions/A/HIToolbox
       0x1b4166000 -        0x1b501dfff com.apple.AppKit (6.9) <153590c1-624c-38fb-8ffb-ba751bccbd16> /System/Library/Frameworks/AppKit.framework/Versions/C/AppKit
       0x1b8960000 -        0x1b8a5bfff com.apple.ViewBridge (640.1) <015ecf34-891e-3308-8c96-d7610255d295> /System/Library/PrivateFrameworks/ViewBridge.framework/Versions/A/ViewBridge
       0x1b12a7000 -        0x1b12e8fff libxpc.dylib (*) <4c6eb90b-bd32-3cad-9f25-c9f234775efb> /usr/lib/system/libxpc.dylib
       0x1b24c1000 -        0x1b28b1fff com.apple.Foundation (6.9) <886a3487-88a6-30bb-b179-1a92996c67cf> /System/Library/Frameworks/Foundation.framework/Versions/C/Foundation
       0x1bcc26000 -        0x1bcc5dfff com.apple.pluginkit.framework (1.0) <85c81a87-a22d-383d-9a5e-c26b0d8a445b> /System/Library/PrivateFrameworks/PlugInKit.framework/Versions/A/PlugInKit
       0x1c4064000 -        0x1c40affff com.apple.ExtensionFoundation (34.5) <d3f061c3-5b84-3f32-a1cb-c441b1805179> /System/Library/PrivateFrameworks/ExtensionFoundation.framework/Versions/A/ExtensionFoundation
       0x1024bc000 -        0x10251bfff dyld (*) <fbb89662-e6f2-3434-b542-f75185ac5e74> /usr/lib/dyld
       0x1b1577000 -        0x1b1583fff libsystem_pthread.dylib (*) <cee8bc77-6923-34d9-89a3-6f8f7279605e> /usr/lib/system/libsystem_pthread.dylib
       0x1b13fd000 -        0x1b143afff libobjc.A.dylib (*) <4b5ab8fb-60e0-3992-ba0e-a073a3fa86a7> /usr/lib/libobjc.A.dylib
       0x1b1527000 -        0x1b153efff libc++abi.dylib (*) <e0fc64a3-790d-34b3-a092-432a0e6b1c82> /usr/lib/libc++abi.dylib
       0x1b13b6000 -        0x1b13fcfff libdispatch.dylib (*) <dc048e3b-e023-3d17-afe5-4ff3dc625608> /usr/lib/system/libdispatch.dylib
       0x102128000 -        0x102167fff com.sweetpproductions.SessionRestore.Extension (2.6.6) <3db5dc8c-9134-38f3-bfca-989f3ddf6867> /Applications/SessionRestore.app/Contents/PlugIns/SessionRestore Extension.appex/Contents/MacOS/SessionRestore Extension

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=1.0G resident=0K(0%) swapped_out_or_unallocated=1.0G(100%)
Writable regions: Total=309.1M written=0K(0%) resident=0K(0%) swapped_out=0K(0%) unallocated=309.1M(100%)

                                VIRTUAL   REGION 
REGION TYPE                        SIZE    COUNT (non-coalesced) 
===========                     =======  ======= 
Activity Tracing                   256K        1 
ColorSync                          432K       21 
CoreGraphics                        16K        1 
Dispatch continuations            80.0M        1 
Kernel Alloc Once                   32K        1 
MALLOC                            99.2M       35 
MALLOC guard page                  192K       10 
MALLOC_MEDIUM (reserved)         120.0M        1         reserved VM address space (unallocated)
STACK GUARD                       56.1M        4 
Stack                             9808K        4 
VM_ALLOCATE                         48K        2 
__AUTH                            2474K      276 
__AUTH_CONST                      19.1M      458 
__DATA                            14.6M      448 
__DATA_CONST                      17.1M      464 
__DATA_DIRTY                      1703K      198 
__FONT_DATA                          4K        1 
__LINKEDIT                       584.0M        3 
__OBJC_CONST                      3316K      250 
__OBJC_RO                         82.9M        1 
__OBJC_RW                         3152K        1 
__TEXT                           466.5M      481 
__UNICODE                          592K        1 
dyld private memory               1024K        1 
mapped file                       57.4M       10 
shared memory                      848K       13 
===========                     =======  ======= 
TOTAL                              1.6G     2687 
TOTAL, minus reserved VM space     1.5G     2687 

SessionRestore v2.6.6 stopped auto-saving 3 days ago. I just tried to manually save a session because I need to Restart, but when I click the Save button, it closes the SR window and doesn't execute anything. I tried relaunching, disabling/reenabling the extension, and running Disk Utility – but problem remains. As I do not trust Safari to properly save my windows and tabs, I thought I would try posting here first for help or ideas, before risking the Restart.

Thanks,
Jeff
SessionRestore v3.6.6
Safari 15.4
MacOS Monterey v12.3.1
2021 MacBook Pro 14" – M1 Pro 32GB