addition of browser extension link

README.md

@@ -34,6 +34,7 @@
 1. [Considered alternatives](#considered-alternatives)
 1. [Questions](#questions)
 1. [Implementation](#implementation-work)
+1. [Browser extension](#extension)
 1. [Glossary](#glossary)
 1. [Links](#links--further-reading)
 
@@ -254,6 +255,10 @@ Finally tracking of all rectangles in user space may not be as efficient as the
 - [https://chromium-review.googlesource.com/c/chromium/src/+/5741652/1](https://chromium-review.googlesource.com/c/chromium/src/+/5741652/1)
 - [https://chromium-review.googlesource.com/c/chromium/src/+/5783139](https://chromium-review.googlesource.com/c/chromium/src/+/5783139)
 
+## Browser Extension
+
+You can try out the Chrome extension [here](https://github.com/jdapena/container-timing-extension). You will need to build it manually for now and load the browser with it set as an argument.
+
 ## Glossary
 
 - **Region**: This is an object which efficiently holds Rects and can calculate overlaps between them plus various other things such as total size etc. In Chromium this would be a [Skia](https://skia.org/) or [SkRegion](https://api.skia.org/classSkRegion.html), Firefox's Moz2D and Webkit's CoreGraphics libraries should have equivalent concepts.