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Re:Windows 11 will respect default browser for system apps i... by kroltan on Wednesday August 30, 2023 @08:43AM (#37321146)
In Windows, default applications are registered either by URL scheme (so ftp, http, https, gopher...) or file extension (.txt, .html, .pdf, .mp4...). As far as I know there is no special registration for "browsers" specifically, you just register your application as a handler for whatever protocols and file formats you want.

So if you want to make your random executable be "a browser", my guess is you should register it as a handler for http, https, and .html, at least.

Re:Windows 11 will respect default browser for system apps i... by heftig on Wednesday August 30, 2023 @11:24AM (#37323611)
To enforce the use of Edge, they're using URLs with the "microsoft-edge" scheme.

Some time ago Microsoft made it impossible to reassign this scheme to another app like EdgeDeflector.

PS: It was KB5007262 that "addresses an issue that might improperly redirect OS functionality when you invoke microsoft-edge: links."