I've asked this same question of Microsoft, as I cannot tell if this is a quirk in Firefox 100.0.2, or in Windows 10 Home, or something to do with what they put… (funda okungaphezulu)
I've asked this same question of Microsoft, as I cannot tell if this is a quirk in Firefox 100.0.2, or in Windows 10 Home, or something to do with what they put in the water here (besides flouride)...
Over the last few days I've had to reinstall Office on this Windows 10 Home system, and had a Firefox update to 100.0.2 as well. Everything working fine up through last night -- URL shortcuts on the desktop would open Firefox (default browser) just fine.
Shut down. Cold boot this morning. Manually open Firefox as usual. Double-click on desktop URL shortcuts (or right-click, Open) gets a real quick hourglass and then nothing. No error, no browser tab.
So I checked: default browser still set to Firefox; .URL filetype still set to "Internet Browser."
I toggled the default browser to Edge, and the links work just fine. Same links. No changes to them.
Toggle it back to the much more privacy-protecting Firefox and... they won't work.
This seems spooky.
Note that the desktop icons for these shortcuts correctly show either the Firefox icon, or the logo/icon for the web page itself (ie, Google Maps). And the toggle of default browser did NOT update the icons.