Migrate about:config settings from 3.6 to 4.0

Question

Over time, I have incorporated many changes and enhancements to Firefox 3.6, in the about:config settings. Many of these are timing changes or speedups of basic settings recommended by users and others intent on making things faster.
Will it be at all possible to move this over to 4.0, or is that pretty much a "start over" kind of project?

Answer 1

Put those prefs into a '''user.js''' file, to make them more "portable". That makes it a lot easier when you need to ''(or want to)'' create a new Profile with all your special Firefox about:config change.
To get started creating a new user.js file you can open your '''prefs.js''' file in a simple text editor program ''(one that won't change the line formatting appearance)'' and copy the prefs that you changed in about:config into another text window line-by-line. <br />''(Yep, you need to find them line-by-line, they're going to be intermixed with prefs set by extension that you have installed.)'' <br />When you have all those prefs in the 2nd window, you can add the code needed by the user.js that differs from what prefs.js uses - '''user_pref(" ''' & ''' ")''' before and after the actual pref - type it once and copy&paste each of those two line-by-line for each pref line.''<br />
http://kb.mozillazine.org/User.js_file <br />
It's a lot of work the first time to get started with a user.js file, but it the long run it's a real time and frustration saver. I have been using the same basic user.js file since 2005, and all I need to do is change the few prefs that might get changed in a new version and also add whatever new prefs that I want to set for the new version, for new added features.
''Additional information about using a '''user.js''' file in Firefox:'' <br />
Firefox looks at the user.js file every time it starts for additions or changes to preferences, and then writes those to the prefs.js file.
'''user.js''' doesn't exist by default, it has to be created. This extension will create that file automatically upon installation and it provides an editing window for the three "user" files from within Firefox. ''You don't have to dig thru your file system every time you want to do a minor edit.''
http://webdesigns.ms11.net/chromeditp.html