firefox 0.99+1.0PR-0ubuntu1 extensions problem

[Rob Diehl]

Another problem I noticed: Firefox will popup a notice to install a 
missing plug-in such as Flash. You tell it to install, it goes through 
the motions, and when its done nothing happens (ie- no plugin is 
installed). I am guessing maybe it is trying to install the linux-x86 
plugin for Flash, but after installing, the browser doesn't recognize 
it? Just a guess.