Locate the Favicon Creator. The default image must be square and above 228 x 228 pixels (I recommend personally recommend using higher than this). Click play, and the action will create 13 icon sizes ...

This is default asp.net website favicon which is used by visual studio. If you want to add a favicon in your website then you have to create a small icon first. Suppose you are having .jpg or .png ...

After visiting your profile folder, you need to locate favicons.sqlite and delete this file. After that, open Firefox to create the same favicon configuration file. It should be created automatically.

Clone the repository from GitHub. Create all favicon images using RealFaviconGenerator and replace existing images with generated images. real-favicon generate favicon_config.json favicon_data.json .