X Dim Mode is a Firefox extension designed to restore the classic Dim (dark blue) background option for X/Twitter users. This extension not only reinstates the beloved Dim theme but also enhances the user experience with additional features. Users can choose from six visually appealing dark themes, or utilize a custom color picker to select any hue that suits their preference.

The extension is compatible with all areas of X, including X.com, X Pro, direct messages, and settings, adapting seamlessly to the user's system theme. X Dim Mode is straightforward to use, allowing toggling between themes via a popup icon or through the display settings within X. It is lightweight, ensuring no data collection or advertisements, providing a clean and enjoyable interface for those who miss the original Dim background.