Please take some time to read the main threads on the forum before you ask a question. As has been said many times in many threads and on many web sites, yes, only older versions of the browser bundle are affected. If you are using the latest browser bundle, released on June 26, you are safe against that exploit. I don't know if they knew specifically about that exploit until the reports came in that it was being used on FH, at which point they would have checked with the Mozilla people and confirmed that it was fixed in the version of Firefox that they used to build the latest Tor Browser.