Well, I am asking about what to do when the MathJax Freezes when you are answering or asking a question? Then you open other tab but you have no draft saved.
Is there any way to recuperate at least the text or part of it?
There is a new version of the MathJax preview code that is now being used on math.stackexchange.com, and I hope that it will resolve the problem you have been having. It should also provide faster math preview and more responsiveness while typing. It is a complete rewrite of the code that hooks MathJax into the editor, however, so be sure to report any other problems that you might have.