Any way to convince Windows 10 that Firefox is my default browser?

This browser along with 5 others was converted to Windows 10 from Windows 7 in January but every time I bring up my browser on this computer I get this message. All the other computers are fine.
If I have done something wrong perhaps someone can help me.
I am out of ideas.
Thanks

Yes, I do that every time I bring up Firefox.
Thanks for the reply.

Craig said:

Did you go to the windows 10 "default" settings and actually switch the web browser to Firefox? Normally, that would do it...

jadinolf said:

Yes, I do that every time I bring up Firefox.
Thanks for the reply.

That doesn't make sense. How? Are you setting the browser as a default browser???

Also... what version of Firefox?

sygnus21 said:

That doesn't make sense. How? Are you setting the browser as a default browser???

Also... what version of Firefox?

Thanks for the reply. I am not at the computer right now but I'll get back to you.

Firefox is 73.0.1. 64bit

jadinolf said:

Thanks for the reply. I am not at the computer right now but I'll get back to you.

Firefox is 73.0.1. 64bit

Sorry, I don't use Firefox. I meant to ask if you were using the latest version or some older version?

And you ignored my first question - "How? Are you setting the browser as a default browser???"

sygnus21 said:

Sorry, I don't use Firefox. I meant to ask if you were using the latest version or some older version?

And you ignored my first question - "How? Are you setting the browser as a default browser???"

I'm sorry, I was not ignoring you. I just wanted to be seated at the computer in question.
I am there now.
So- I bring up Firefox and get this graphic.

Then the next graphic

I chose Firefox and exited.
If I reboot I click on the Firefox icon the whole process repeats it self.
This problem is not the end of the world for me but I would like to see it work normally.
I have six computers and this one is the only one with this problem.
Thanks for the response.

This popped up as soon as I posted.

Craig said:

That is the current version he has....When you set it....are you clicking on the actual button that pops up when you open firefox? If not, try that....let the button open the "default" program in windows and then select Firefox on the web browser list...That SHOULD lock it in...and uncheck the "always check" box BEFORE you hit that button...

That's what I am doing already.