Something with the update check?

I can and have updated the Developer version but the crashing stays.

Regards

Reinder

But it still does update checks. As a test, try to disable updates with a policy => https://mozilla.github.io/policy-templates/#manualappupdateonly

OK I get it. I checked my system but its Windows 11 home and does not allow group policies.

Regards,

Reinder

I stopped the FF update installing automatically. The crashing seems to be stopped but the browser is very slow. In FB the messenger won't load so there must be more then one issue.

Regards,

Reinder

By the way, standard FF is running alongside smootly without any problem.

Regards,

Reinder

Update, the crashing continues despite changed setting for installing the updates.

regards,

Reinder

Are you using "Clear history when Firefox closes"?

Signature:

• Firefox 126.0b9 Crash Report [@ AsyncShutdownTimeout | IOUtils: waiting for profileBeforeChange IO to complete | JSON store: writing data for 'targeting.snapshot' ]

AsyncShutdownTimeout:

{
 "phase": "IOUtils: waiting for profileBeforeChange IO to complete",
 "conditions": [
  {
   "name": "JSON store: writing data for 'targeting.snapshot'",
   "state": {
    "sanitizedBasename": "targeting.snapshot"
   },
   "filename": "resource://gre/modules/JSONFile.sys.mjs",
   "lineNumber": 126,
   "stack": [
    "resource://gre/modules/JSONFile.sys.mjs:JSONFile:126",
    "resource://gre/modules/BackgroundUpdate.sys.mjs:scheduleFirefoxMessagingSystemTargetingSnapshotting:754",
    "resource:///modules/BrowserGlue.sys.mjs:task:3021",
    "resource:///modules/BrowserGlue.sys.mjs:_scheduleStartupIdleTasks/<:3161"
   ]
  }
 ]
}

Yes, i do use this feature.

Regards,

Reinder

My FF settings are, almost, the same for several years and not changed recently. I'm synchronizing FF on all my pc's and laptops. Only my main PC is showing up this problem. The other instances are working, as usual, just fine.

Regards,

Reinder