I just tried migrating my 4.x profile over and I am getting a start-up error that seems to prevent my prefs.js file from being read. The error says "An error occurred reading the startup configuration file. Please contact your administrator. missing ; before statement. This is a generated file! Do not edit. and after pressing OK "Error in prefs.js file. Default preferences will be used." I placed my prefs.js file, which works fine in 4.x, at http://slip/projects/dogbert/test/install/

Paul, How did you migrate the profile? The comments are being removed during profile migration. Your prefs.js file after migration has the following lines # Mozilla User5 Preferences This is a generated file! Do not edit But it should be # Mozilla User5 Preferences //This is a generated file! Do not edit. We have the comments in the 4.x prefs file also. Neeti

I used the apprunner -installer command and then selected the profile and clicked on Migrate.

Paul, could you try the migration again, because when I do it, I get the following lines in my prefs.js file # Mozilla User5 Preferences //This is a generated file! Do not edit. I do not get start-up error. Thanks, Neeti

I deleted all my profiles except one, because I heard there was problems with migrating multiple profiles,and then migrated, and everything is now OK. Thanks.

Moving all libPref component bugs to new Preferences: Backend component. libPref component will be deleted.