The browser might be or not "case sensitive" but it actually doesn't matter in this situation. The browser asks a resource by sending an URL to the web server (for example, img src="images/location/home.jpg" in the starting home page after clicking on "GO"). When the browser is running a local file or asking a local file, the request goes to the operating system that forwards it to the filesystem. In my case ext4 (my filesystem) is case sensitive, so it delivers exactly what it finds at the end of the URL.
All my browsers (Firefox 80.0, Brave 1.12.114 based on Chromium 84.0.4147.135 & Opera 70.0.3728.133) didn't get home.jpg because the directory under "images" is called "Location" instead of "location". I bet if I was running a NTFS filesystem, all these browsers would get home.jpg (or HOmE.JpG) and the page would render just fine. For ext4 home.jpg and HOmE.JpG are two different files and for NTFS they are one and the same.
NTFS isn't case sensitive by default. Looks like you can
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on a folder/directory level these days in Windows 10. I didn't have any problems with developing websites locally in my Windows computers since the 1990s but I had trouble as soon as I published websites on public webservers that were usually running Linux and usually ext2/ext3 filesystems. I stopped using Windows almost a year ago when I moved out of Win7 that I had used since it was a release candidate.
If I rename the directory images/Location to images/location, all location images show in the browser because you have used images/location/[filename] in the html source code. None of them showed before I renamed Location to location.
(Also, some Nicolette's assets fail to load due to "images/forestroad/27/Nicolette" because img src="images/forestroad/27/nicolette/first.jpg" when meeting Nic for the first time. )
Just a thought: If turning on the case sensitivity in NTFS doesn't work, you could install VirtualBox to run a virtual Linux (maybe Linux Mint) to test out your work if you really want the proof that you have tested your code and files against case sensitivity. Remember to use ext4 for your virtual diskdrive.
PS. I decided to test my theory so I formatted an older usb2 stick to FAT32 and extracted files from the zip archive. Then I ran the html in my Firefox. Requested img from "images/location/home.jpg" was delivered from "images/Location/home.jpg". Same happened with both Brave and Opera.