Website Dimmer is a free Chrome extension developed by no9 that provides a night mode for all HTML-based websites. With this extension, you can darken website backgrounds and adjust the color of text to make it easier to read.

One of the main features of Website Dimmer is the ability to set preferences for specific domains. When you right-click on the extension button, a menu will appear where you can switch settings for the current website. These preferences will be saved and used as the default for that particular website. If you want to clear the stored settings, there is an option to do so.

Website Dimmer does not affect pictures and videos, only the background and text colors. It also allows you to adjust the dim levels, giving you the option to have a full blackout or partial dim for the backgrounds.

Please note that Website Dimmer is still in the development stage, so some changes in the menu options may require you to turn on and off night mode or reload the webpage. The extension uses your browser storage to save preferences, and the domain of the webpage is registered.

Overall, Website Dimmer is a useful tool for those who prefer a darker color scheme for easier reading on HTML-based websites.