I have included multiple modifications to the user.js file (SLES11, firefox-3.6.16-0.2.1) to acheive most of my requirements, but I cannot find the about:config setting that prevents usernames (and passwords depending on the setting chosen) from saving. I have been using about:config to confirm the setting in pref.js then I change the setting back to the default in about:config, and add the appropriate config line to user.js rather than have it set in pref.js The information I found online directs me to Edit --> Preferences, but this configuration needs to be written for use in a base image to be distributed.