I've tried several ways to make Firefox my default browser and no luck. Most of the processes indicate I have to click on web browser (currently shows Internet Explorer) and I should see Firefox in the list of possible browsers. My issue, I don't see it in the list. I see two entries for Microsoft Edge, and one each for Google Chrome and Internet Explorer.... and that's it. So, how do I proceed with my issue... any help will be greatly appreciated...

many thanks