Übersetzung Translation Default browser can not be selected

I installed Opera and it was probably the default browser changed. But if I want to change that again there are Edge, Chrome, ie and Opera in the list, but no Firefox ... how can I change that ??

For some reason, Win 10 makes it hard to select Firefox. Aus irgendeinem Grund macht es Win 10 schwierig, Firefox auszuwählen.

Please check out these links: Bitte überprüfen Sie diese Links:

https://support.mozilla.org/en-US/questions/1207775

https://support.mozilla.org/en-US/questions/1208759#answer-1086882

https://support.mozilla.org/en-US/kb/how-change-your-default-browser-windows-10

https://www.bing.com/search?q=change+default+browser+windows+10&pc=MOZI&form=MOZSBR

thank you, the first link fixed it*yeah*

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