Update README.md

README.md

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 # Jira Dark Theme
 Jira Dark Theme Userstyle
 
+(Other people might call this: Dark mode, Night mode, Night theme, Eye care).
+
 [![Install directly with Stylus](https://img.shields.io/badge/Install%20directly%20with-Stylus-00adad.svg)](https://raw.githubusercontent.com/aalvarado/jira-dark-gray/master/jira-dark-gray.user.css)
 
 # Installation instructions
 1. Install [Stylus for Firefox](https://addons.mozilla.org/en-US/firefox/addon/styl-us/), [Chrome](https://chrome.google.com/webstore/detail/stylus/clngdbkpkpeebahjckkjfobafhncgmne), [Opera](https://addons.opera.com/en-gb/extensions/details/stylus/) or [Cascadea for Safari](https://cascadea.app/).
 2. Click here [![Install directly with Stylus](https://img.shields.io/badge/Install%20directly%20with-Stylus-00adad.svg)](https://raw.githubusercontent.com/aalvarado/jira-dark-gray/master/jira-dark-gray.user.css)
 
+# Why?
+I believe that we should be able to change any background we want from any website we want. 
+I consider night mode a fundamental feature that should be provided because it reduces eyestrain and user fatigue. 
+
 # Preview
 
 ![Preview of Jira Dark Gray](./jira-darks-preview.png)