how to make Firefox my home page??

What do you mean, what do you want to see?

Settings > Home and startup > Home page

how to make Firefox my home page??

Firefox is a web browser and not say a Homepage nor as a search engine or such.

You can use the default Firefox Home in Firefox, a blank page or set your own choice of a custom URL as the Homepage.

https://support.mozilla.org/en-US/kb/how-to-set-the-home-page

Or are you really asking how to make Firefox the default web browser on Windows?. https://support.mozilla.org/en-US/kb/how-change-your-default-browser-firefox-windows

I'd like to make firefox the default browser on my android if possible. Isthat possible?

I'd like to make firefox the default browser on my android if possible. Isthat possible?

Yes, it's possible. However, please don't post your questions in unrelated threads. Use this link instead.