Product Firefox Release Channel release Version 50.0.1 Build ID 20161123182536 OS Windows 7 OS Version 6.1.7601 Service Pack 1

1290403NEW --- Crash in chtbrkg.dll@0x2e1f0

chtbrkg.dll = Internet Download Manager integration = Adware

You may have ad / mal-ware. Further information can be found in the Troubleshoot Firefox issues caused by malware article.

Run most or all of the listed malware scanners. Each works differently. If one program misses something, another may pick it up.

hi, thanks for providing a crash id. unfortunately these crashes are probably triggered by malware that's present on your system and hooking into firefox (a lsp monitoring your network traffic labelled "chtbrkg.dll"). please go to the windows control panel / programs and remove all toolbars or potentially unwanted software from there (especially anything dubbed "adskip" or other programs you haven't installed intentionally). then please also try running security scans with various other tools like the free version of malwarebytes, adwcleaner & eset online one-time scanner.

finally you may also refer to this blog entry on how to proceed with malicious lsp-modules: https://blog.malwarebytes.com/cybercrime/2014/10/changes-in-the-lsp-stack/