set mozilla firefox as default browser

Hi

This support article should help:

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

Open your system Settings, go to Apps, then Default apps, find your browser in the list, open it, and click "Set default" near the top of the page. You can also do it from inside the browser itself: open its Settings page, stay on the General section, and click the button there that makes it the default browser. To confirm it worked, click a web link in another app and check that it now opens in your browser.