I don't think anyone knows the full capabilities of the Hacking Team tools...

The attacks using the Flash plugin are the best known, and as far as I know, those are not applicable to FirefoxOS. However, there could be vulnerabilities in the browser itself that would allow the injection of some code or installation of some software. Whether the Hacking Team has anything to install on FirefoxOS is another question mark.

Mozilla fixes specific browser vulnerabilities as they are reported to the developers, but many fixes may not be pushed out until the next scheduled update.

Thank you. I think it must be tested.

May be firefox OS is safe because it is most trust OS, and browser that don't track you

I think tracking on the web is not something about RCS. RCS seems to install malware app on the phone.

Ditto what jscher2000 said. At this moment, it is very rare for this to occur, however, in the future as Firefox OS further develops, the developers and engineers will make sure that this type of "hacking" will not be able to take place.

Thanks for choosing Mozilla, and Firefox OS!