How do I change the default browser?

I have for many years used Firefox and all data downloads and e-filing goes through Firefox. This year however the CRA has done something that prevents me from signing into their website through Firefox. I can sign in through other browsers - like for instance Explorer. But how do I get Taxcycle to recognize that it should sign in through Explorer and not Firefox for download/e-file purposes? I poked through options looking for something but couldn’t find anything.

For AFR you can set the browser at the bottom of the AFR window here:

Yay! it works. I figured it was something simple but never noticed that little tick box at the bottom of the page.