Facebook Chat

What message is that?

Facebook didn't sign their Oracle Java application, and OS X expects developers to have digitally signed their code. This is a security feature intended to reduce your exposure to malware.

To override the OS X security check being performed here, control-click on the application and select Open from the pop-up menu, and you'll be asked for your administrative credentials. You'll then be able to access the application.

This sequence will be needed only once for the application as OS X remembers that you've asked to override and access the app.

It's also possible to turn off these Gatekeeper checks, but that's not recommended.

When you say "control-click on the application" what application do you mean? The web browser (in my case Firefox) or the .jar file for Facebook Video Chat?

The jar file.

I do not have FB video chat option available in Mavericks.. anyone has a solution??

Still having problems as well. Even with Gatekeeper turned off the option for video chat doesn't appear. Truly annoying. Annoying enough that it's keeping me from upgrading other machines.

Please directly ask the Facebook folks or whomever else is supporting this particular app.

Whoever is maintaining the app will probably never see this discussion, after all.

thank you so much Mr Hoffman