Thank you for pointing me to Plug-Ins, I was not fully aware of the difference between plug-ins and extensions.
Unfortunately disabling all Plug-ins and extensions does not help.
I summarize -
Extensions: negative
Plug-Ins: negative
Profile: negative
NS prefs: negative (they are part of the user profile, right?)
As said before, I use Windows 7 and Firefox 17.0.7. FF says it is updated on channel "esr". Does anyone else use this specific version of FF with NS? It is an administrated computer, therefore I have no privileges to downgrade or install another version of FF.
Unfortunately disabling all Plug-ins and extensions does not help.
I summarize -
Extensions: negative
Plug-Ins: negative
Profile: negative
NS prefs: negative (they are part of the user profile, right?)
As said before, I use Windows 7 and Firefox 17.0.7. FF says it is updated on channel "esr". Does anyone else use this specific version of FF with NS? It is an administrated computer, therefore I have no privileges to downgrade or install another version of FF.