Product Firefox Version 43.0.3 Build ID 20151223140742 Release Channel release OS Windows NT OS Version 6.1.7601 Service Pack 1 Build Architecture x86

Signature banksafe.dll

Banksafe.dll = G Data Security Software

Disable or check for updates.

Do you have nvidia's network access manager or forceware network manager software installed? Disable / remove it.

hi, this seems to be a crash with banksafe.dll (that's a module from your gdata av-software) involved - it's probably best to contact gdata's support about this issue as well...

in the meantime you might want to go back to firefox 43.0.2 and disable auto-updates for the moment in the firefox menu ≡ > options > advanced > update section, until there is a better solution available. here is the download directory for firefox 43.0.2, please pick the right language code: http://archive.mozilla.org/pub/firefox/releases/43.0.2/win32/

Fred, I do not have nvidia's network access manager or forceware installed. but thanks!

I will try going back to the older version of firefox you recommended, Philipp

hey again, in the meantime there are different solutions available: Firefox 43.0.3 startup crash with G DATA security software