In my current project there is a SAVE / LOAD that creates an original file extension, for example: "Whatever.alon"
When LOADING or just browsing on Windows 10 (my current system) obviously there are no specific icon for .alon files since windows doesn't know what they are.
Just to be clear, I'm NOT talking about the standalone .exe file that I will finally export from C3 as NWJS.exe before publisihg but my very own file extension as I explained.
1 - How can I make windows recognize the icons, so when a user will install it on their own OS these files will shown by the icon I decided.
2 - What sizes of the File extension ICONS do I need to create so it will be shown in any browsing mode, for example: "Tiles", "Extra Large", "Details" and other VIEW options on Windows.
3 - Will these File Extension ICONS be recognize also on Linux and Mac OS?
(I'm just a windows user)
If anyone here already released a public version on Steam, itch or other marketplaces it will be a great if you can share your experience of this.
Thanks ahead for any help or explanation of the procedure.