Hello, I'm a new Firefox user (I finally got fed up with ad-infested Chrome making necessary extensions I need to safely browse the internet not work any longer). When I changed to Firefox as my default browser, however, it replaced my local HTML file icon for my home page (which is on my desktop) to this butt-ugly icon I can't seem to change (I absolutely abhor dark backgrounds on ANYTHING, as they give me blurred vision and migraines thanks to a neurological issue). Unfortunately, Windows 10, in all of it's user unfriendliness, has decided not to give me the option to change icons using the properties window (there's no "Customize" tab). Can anyone tell me how to fix this, please? I do my own custom HTML pages a LOT, and I don't want to have to leave my default browser set to Chrome because their HTML file icon isn't a total (and literal) eyesore.

Thanks for any help you can provide!