DocsAfterDark is a Firefox extension designed to provide a dark mode for Google Docs, aimed at reducing eye strain during document editing. Users can easily toggle dark mode on and off without altering the original document design, ensuring a seamless transition between light and dark viewing experiences. The extension allows customization of the document background, supporting various CSS values, including images and gradients, for a personalized touch.

Additional features include invert and grayscale options for rendering text comfortably in dark mode, and the ability to disable document borders for a more integrated workspace. Users can access settings through the extension icon in the browser toolbar, with a global toggle for easy enablement and disablement of the extension. The source code and updates are available on GitHub, and users have the option to support the project through donations.