From computerworld
"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.
"We're doing this for stability and user control [reasons]," said
Johnathan Nightingale, manager of the Firefox front-end development
team, in an e-mail today. "Dropping raw components in this way was
never an officially supported way of doing things, which means it lacks
things like a way to specify compatibility. When a new version of
Firefox comes out that these components aren't compatible with, the
result can be a real pain for our shared users.
"Now that those components will be packaged like regular add-ons,
they will specify the versions they are compatible with, and Firefox
can disable any that it knows are likely to cause problems,"
Nightingale added."
Read more: http://www.computerworld.com/s/article/9141044/Firefox_3.6_locks_out_rogue_add_ons