Firefox Extensions Question

Ok I know how to move all my bookmarks to another computer, but is there a way to like tell firefox to save a list of the extensions you have, and when you use it on another computer it installs them in that firefox?

There's a file called bookmarks.html in the user's home-dir.
application date -> mozilla -> firefox -> profiles -> <profile name>

just copy it to the other client und use the import-function in the file-menu