Firefox extension should update application defaults?

[broder]

Regardless of how the PDF reader debate plays out, there will be a particular PDF reader that Debathena prefers.

If it's not acroread, we should consider upgrading people's Firefox profile defaults when they use Debathena.

We should figure out a good way to do this - preferably one that doesn't break acroread under Athena, and also allows users to change the defaults back.

Something akin to a .generation file within the Firefox profile may be a good start here, but I'm not sure what the whole implementation would look like.