rpm packages of thunderbird/firefox extensions

[Orion Poplawski <orion cora nwra com>]

Is it possible to create rpm packages of thunderbird and firefox 
extensions?  I'd like to install some global extensions on each of our 
machines and I'd prefer to have rpms, but not sure how it would interact 
with or replace the -install-global-extension option.  Perhaps 
fedora-packaging is a better place to ask?

It might be nice for fedora extras to be able to provide extensions as well.