Not affected are recent and current versions of Firefox and Chrome browsers. There is a FREAK test page you can use to see if your browsers are safe from this exploit. Run that page from each web browser you have installed on your computer or hand held device. Some will be safe, others will not.
For instance, I tested my PC with Firefox, then Google Chrome. Both came back as unaffected. But, I then ran the test from the latest version of Internet Explorer (11) and got this result in red:
This means that I, like most of you, will have to wait for Microsoft to release or push out a patch for this new vulnerability; one going back a decade.Warning! Your browser is vulnerable to the FREAK attack. It can be tricked into using weak encryption if you visit a vulnerable website. We encourage you to update your browser right away.
The hard core technical details about the FREAK vulnerability are found here. That page also has a browser safety test at the top.
Note: JavaScript must be enabled to test your browsers. So, allow scripting if you use the NoScript Add-on for FF.