Linked by Olier Raby on Mon 25th Jun 2007 23:48 UTC
Firefox add-ons, or extensions, are small programs that run inside the browser in order to customize some behaviors. In theory, it is possible to develop and maintain a multilingual, multiversion and multiOS Firefox add-on. In practice, there are many obstacles to overcome in order to create and to maintain a working Firefox add-on in one language for one Firefox version and for one OS. 
