A dark theme for night and daily web browsing will save your eyesight from unnecessary strain. Dark Reader is an extension for Google Chrome and Mozilla Firefox, with which your eyes will be safe.
This extension replaces light backgrounds on websites with dark backgrounds. There are settings for brightness, contrast, sepia overlay and grayscale level. However, it is worth knowing that the extension does not have access rights to the browser theme, extension store pages, and browser settings.
Dark Reader does not embed ads or collect user data. The source code is open on GitHub.
Before installation, developers recommend disabling all such extensions.