Big KA Chrome extension enhances the coding experience on Khan Academy by enlarging the text window and removing unnecessary elements. If you find the default text editor size on Khan Academy limiting, this extension can be a helpful solution. It aims to provide a more spacious and focused coding environment for longer coding sessions.

The extension enlarges the text window for coding purposes and streamlines the interface by eliminating distractions like headers and footers. However, it is important to note that the extension is described as "hacky" and may have bugs. It is recommended for users who engage in extended coding sessions and are willing to trade off some functionality for an improved coding interface.