Decreased Productivity (DP) is a Firefox extension aimed at improving user privacy and control over their web browsing. This tool allows users to enable a customizable 'stealth browsing' mode, where they can adjust visual elements such as text and background colors, hide images, and modify fonts for a more personalized browsing experience. The extension supports multiple languages and offers features like tab-specific settings and domain whitelisting or blacklisting, allowing users to tailor their online environment according to their preferences.

In addition to its customization options, DP provides various modes for content visibility, giving users the choice to cloak or display multimedia elements as desired. It also includes practical features such as keyboard shortcuts, the ability to import and export settings, and the option to incorporate custom CSS code. This makes Decreased Productivity a versatile extension for managing online privacy while enhancing user productivity.