Regular update of your firefox extensions

I am thinking to write a script which will update extensions in firefox which have updates available for them.

I constantly see this problem of firefox memory leaking and CPU consumption where there is some update for the extension available and i have not updated, there is a huge memory leak and everything slows down.

I am thinking to write a script which will be invoked only when there is a update available i.e. comet technology (server push technology).