User Agent: Mozilla/5.0 (Windows NT 6.1; Trident/7.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; .NET4.0E; rv:11.0) like Gecko Steps to reproduce: Update to Firefox 40 Actual results: Crash at first startup after the update has been applied. I haven't been able to start Firefox since the update, even in safe mode Expected results: Firefox should have started

Additional infos : Firefox window appears briefly, then Firefox crashes. I've sent a few crash reports, but don't know how to list them here as I don't have access to about:support anymore...

You can find the crash IDs in the folder %APPDATA%\Mozilla\Firefox\Crash Reports\ There are 2 folders, /pending and /submitted. If the crash reports have been sent, check /submitted. Then post some crash IDs (like bp-0a61f247-6392-41b9-a876-66a602120802).

Thanks. Here they are : bp-bbf9a449-f74e-4497-b617-1050b2150812 bp-afeec441-45c1-4239-8d40-8b7462150812 bp-f82b1d30-97f5-4fae-8d76-d57232150812 bp-3eca6e86-a18d-46fe-86cc-d6c1f2150812

it seems like this bug is a duplicate of https://bugzilla.mozilla.org/show_bug.cgi?id=1181091 and I have Kasperky Endpoint Security 10 installed on my system too..

Already reported, I dupe it.

Does FF start if you disable the web protection in Kasp? (or anything which scans FF traffic or activity)

The suspected software is called Websense Endpoint. I believe that's different from Kaspersky Endpoint.

I cannot disable Kasperky sorry, I don't have admin rights on the computer..

(In reply to David Major [:dmajor] from comment #7) > The suspected software is called Websense Endpoint. I believe that's > different from Kaspersky Endpoint. Not a duplicate then ?

(In reply to jcleval from comment #9) > Not a duplicate then ? I think duplicate is correct. As far as I can tell, your machine does have a Websense Endpoint file. If you also happen to have Kaspersky Endpoint then I guess that's a coincidence.