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Reverse Firefox as Default browser

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I have to reverse Firefox as my Default browser as Firefox (not as default) has all my passwords and they automatically plug in. HELP please. Urgent!

I have to reverse Firefox as my Default browser as Firefox (not as default) has all my passwords and they automatically plug in. HELP please. Urgent!

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If you are using windows, go to settings and search default apps, and select Firefox for the web browser.

You can also go to settings, in Firefox and search default to set Firefox as default web browser, both ways are perfect but prefer the Firefox settings one.