Demon Slayer: Kokushibo theme high-definition wallpaper is a browser extension that collects a large number of high-definition wallpapers to help users set them as their browser backgrounds.

This extension has the following features:
- Massive collection of high-definition wallpapers: This extension gathers a large number of wallpapers covering different resolutions and sizes to meet the needs of different devices.
- Easy setup: With just a few clicks, users can set the wallpaper as their browser background. They can also adjust its size and position, and freely set the wallpaper switching frequency.
- Auto-adaptation: This extension supports automatic adaptation to browsers and devices, without encountering compatibility issues.
- No advertisements: This extension does not have any advertisements interrupting the browsing experience.
- Personalized search: Users can choose any search engine for information searches.
- Calendar feature: Date and time are displayed on the homepage.
- Real-time weather: Weather updates in real-time.
- To-do list feature: Users can easily keep track of their tasks and important matters.
- Note-taking feature: Record the little things in life."

This product will earn revenue through Amazon affiliate, Ebay affiliate, Booking affiliate, and will also earn revenue from Bing search and Baidu search.