The Nostalgia.fun extension isn't on the Web Store — but installing it takes less than 60 seconds. Here's how.
EXTENSION PREVIEW (NOT THE REAL EXTENTION)
INSTALLATION GUIDE
.zip archive will land in your Downloads folder — keep note of where it saves..zip → Extract All. Mac: Double-click it. Move the extracted folder somewhere permanent like your Documents — Chrome needs the folder to stay in place.chrome://extensions in the address bar and hit Enter — or use the three-dot menu → Extensions → Manage Extensions.