Update README.md

README.md

@@ -1,5 +1,11 @@
 # Zend Debugger Toolbar add-on for Firefox
+
 Zend Debugger Toolbar for Firefox provides integration with Zend debugging and profiling tools.
 
-## Building XPI
-To build XPI from the sources call 'mvn clean install' in the project root.
+## Installation
+
+The add-on is available for installation at Mozilla Add-ons: https://addons.mozilla.org/en-US/firefox/addon/zend-debugger-toolbar/
+
+## Testing locally
+
+Any modifications to the code can be tested locally as a [temporary installation in Firefox](https://developer.mozilla.org/en-US/Add-ons/WebExtensions/Temporary_Installation_in_Firefox).