Merge pull request #4 from maximilionus/fix/readme_installation

Fixed required extension in README and enhanced it structure

Author: maximilionus

README.md

@@ -2,16 +2,15 @@
     Python Docs<br>
     Dark Theme
 </h1>
-<details align="center">
-    <summary>Preview Image</summary>
+<details align="center"><summary>Preview Image</summary>
     <img src="./images/preview.png">
 </details>
 
 ## About
 This repository contains the userstyle dark theme for python documentation and other web pages that inherit the stylesheet from official docs.
 
 ## Installation
-1. Ensure that **Stylish** extension ([Chrome](https://chrome.google.com/webstore/detail/stylish-custom-themes-for/fjnbnpbmkenffdnngjfgmeleoegfcffe), [Firefox](https://addons.mozilla.org/ru/firefox/addon/stylish/)) is installed in your browser
+1. Ensure that **Stylus** extension ([Chrome](https://chrome.google.com/webstore/detail/stylus/clngdbkpkpeebahjckkjfobafhncgmne), [Firefox](https://addons.mozilla.org/ru/firefox/addon/styl-us/)) is installed in your browser
 2. 📦 [Install the usercss](https://github.com/maximilionus/python_docs_dark/raw/master/python_docs_dark.user.css)
 
 ## Supported Domains
@@ -20,4 +19,4 @@ Here's list of domains that are currenlty supported by this userstyle.
 - docs.python.org
 - packaging.python.org
 
-> If you know of other domains that inherited the style from docs.python.org, you can notify me via [Issues](https://github.com/maximilionus/python_docs_dark/issues)
+> If you know of other domains that inherited the style from docs.python.org, you can notify me by [creating the new issue](https://github.com/maximilionus/python_docs_dark/issues/new?labels=add%20to%20supported%20pages)