Portability in Prezi to different computers

I think that the fact that Prezi always requires the last up-to-date browser and Flash will make me stop using it.  Every time I go to a conference I am stressed thinking if the presentation will work in the conference’s computer, I cannot rely on this platform given these issues. With the new Prezi version is even worse, neither works in Firefox. Not to say that Linux users as I am, should look for another computer to create it (because Flash does not longer support Linux) and to present it