Firefox 3.6 locks out rogue add-ons.
Mozilla will add a new lockdown feature to Firefox 3.6 that will prevent developers from sneaking add-ons into the program, the company said.
The new feature, which Mozilla dubbed "component directory lockdown," will bar access to Firefox's "components" directory, where most of the browser's own code is stored. The company has billed the move as a way to boost the stability of its browser.
Source - Firefox 3.6 locks out rogue add-ons | Security Central - InfoWorld