IT: Ideas for Firefox

The Scenario:I've just installed a new OS on my computer and I fire up Firefox and want to get started browsing the web.

The Problem:
All of my favourite extensions are gone. Even worse, all of their settings are gone.

What to do:
Fortunately all of the extensions are available from Mozilla updates. Unfortunately that's not the end of the story, because now I have to set up ForecastFox to be positioned in the menu area, to show the weather for Canberra, etc. etc. I also have to setup Foxclocks again etc.

A Solution:
Wouldn't it be nice if:

1. I could have all of my extensions available from a server. This could even just be a list which can then use the Mozilla Updates site to actually download the extensions. Many PCs could sync the set of extensions installed.
   
2. I could also sync my extension settings from this server.

In this way, my work PC, home PC and any other PC can be setup to work with Firefox just the way I like it, very quickly. A new extension installed at work would automatically show up on my home browser after the next synch.

Of course, this could extend to other software on the PC as well, including Thunderbird. Privacy features could involve separating private (passwords and mail accounts) and public settings (Forecast for Canberra). By default only public settings would be synched.