Firefox portable doesn't have the Reset Firefox Option.

Yes, it does. At least that is what is reported in Firefox's help. See http://support.mozilla.org/en-US/kb/reset-firefox-easily-fix-most-problems

Portable Firefox does not have the Reset Firefox option, as it doesn't have a profile to point to. Also, portable Firefox isn't an official build of Firefox. So, to answer your question, there is no Reset in Portable Firefox, only in Desktop Firefox with a profile in the proper location. The article isn't talking about Portable Firefox since it isn't an official mozilla build.

Now you have made it all clear to me. When I posted my inquire I remarked that it was a portable version, but didn't know that it was not official and hence not supported. Didn´t also know anything about profiles in the browser since I have always used portable versions that now I realize lack that posibility. Thank you very much Tylerdowner for your post. I really appreciate your answer.