How do I make Firefox Portable the default browser under Windows 10? I was able to do this under Windows 7, but not Windows 10.
New: HandBrake (Feb 20, 2026), Platform 30.2 (Feb 17, 2026)
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I had exactly the same problem. Resolved it by following this guide.
http://www.winhelponline.com/blog/register-firefox-portable-with-default...