This should still be working.

Did you check for errors or no longer supported pref settings in the mozilla.cfg file?

Also make sure that the .js file in defaults\pref to include the mozille.cfg file is still present.

Place a file local-settings.js in the defaults\pref folder where you also find the file channel-prefs.js to specify using mozilla.cfg.

pref("general.config.filename", "mozilla.cfg");
pref("general.config.obscure_value", 0); // use this to disable the byte-shift

See:

• http://kb.mozillazine.org/Locking_preferences

You can use these functions in mozilla.cfg:

defaultPref();  // set new default value
pref();         // set pref, but allow changes in current session
lockPref();     // lock pref, disallow changes

Thank you for your quick response. I find it strange that in 17 I did not require anything in defaults\pref in order to make use of the mozilla.cfg file. Was this a new change with 18? Does it matter that the version of 17 I am running says "Firefox ESR" and the version of 18 does not?

Hi, please check if it is only a mozilla.cfg problem: try to manually configure proxy and authenticatoin on one client running firefox 18 and see if it is working.

I think there is an issue with firefox 18+authenticated proxy : i am investigating for narrowing down the problem and looking for a workaround.

Regards mrc2k

mrc2k,

    Firefox 18 did not even come with mozilla.cfg which leads me to believe that the version of 17 ESR is why I was having such success with altering the mozilla.cfg file. I believe I may have resolved my own query but will not know until later when I can load 17 ESR on the problem server. Thank you for your reply.