ChromEx is a chrome extension that beautify each new tab with nice background images fetched from unsplash images stock.
Once the extension is added to your browser click on the extension icon and add keyword of the type of image you want to use for the background. Ex: nature, food etc...
To use this repo by cloning it or downloading it. Once done, go to the app.js file and change the client_id value to the one you get from unsplash API. You can alse use any other image stock api by adapting the request url and even methods.