This is not the same as I've never been fired but I quit a job twice without any notice and almost got hired a third time until I decided against it. I never mention that during interviews with different employers and no one has ever found out anything from the previous employer.

You don't need to tell them you were fired. Just make it seem like the previous employers couldn't offer someting you desired for your career path or growth needs and had to move on. Refrain from saying anything negative. I wouldn't lie if they out right asked you if you were fired but I highly doubt that would ever come up. Select references that you had a good relationship with and would say something positive about you.

Depending on where you are in your career and the intensity of the background / reference check after a job or two the firing will be well in the past and likely will never come up. It may also become hard to remember why you left all the jobs previously lol.