add install guide

Author: ApocalypseCalculator

install.md

@@ -0,0 +1,9 @@
+# Installation Guide
+
+First of all, download the latest release from the [Releases tab](https://github.com/ApocalypseCalculator/AnotherAdBlock/releases)
+
+After unzipping the folder, go to your extensions page (chrome://extensions for Chrome, edge://extensions for Edge, and so on). 
+
+Find the **load unpacked** button and select the unzipped folder of AnotherAdBlock. 
+
+If you see the icon with a "ON" banner, it is ready for use!