When I shutdown the PC or reboot, I see a "Plugin-Container.exe Application" window with the following message: A breakpoint has been reached 0x80000003 occurred in the application at location 0x0000000070B0F035 <==Note: sometimes the location is slightly different. Click OK to terminate the program. I am using Firefox v48.0.2 on a 64x Win10 Pro system. Extensions in use are: AdBlock Plus FireFTP Malware Search LastPass Two other extensions installed but disabled are: PDF Architect Creator 3 SmartPrintButton I have seven folders with names similar to the following: "C:\ProgramData\Microsoft\Windows\WER\ReportArchive\AppCrash_plugin-container_763d69d17e653051b5a4babbf872358858b9b9b_7b60fbe1_053de5a4" I have five CrashDump files with names similar to the following: "C:\Users\RAS\AppData\Local\CrashDumps\plugin-container.exe.3240.dmp" Firefox and the four extensions appear to be working at normal speed and they function normally in all respects. The error comes up only when I shutdown the PC or reboot it. It prevents shutdown or reboot until I click OK. Please tell me how to fix this error or give me trouble-shooting advice. Thank you, DW