Earlier this week, I wrote about a highly critical and unpatched vulnerability that puts millions of Web surfers at risk of malicious hacker attacks. Since then, there has been word that the release of the vulnerability and exploit was self-inflicted (Mozilla exposed the bug themselves) Official instructions on how to mitigate the risks until a patch is ready. The vulnerability can be mitigated by disabling the JIT in the JavaScript engine.
Source: https://threatpost.com/mitigating-critical-firefox-35-vulnerability-071609/72886/