update readme

Author: moribellamy

README.md

@@ -1,9 +1,16 @@
 # GrayTabby
+
 [![Build Status](https://travis-ci.com/moribellamy/graytabby.svg?branch=master)](https://travis-ci.com/moribellamy/graytabby)
 [![Coverage Status](https://coveralls.io/repos/github/moribellamy/graytabby/badge.svg?branch=master)](https://coveralls.io/github/moribellamy/graytabby?branch=master) (selenium coverage not included)
 
 GrayTabby is a tab archiver for Chrome, Brave, Firefox, and Opera.
 
+# Download
+<a href="https://chrome.google.com/webstore/detail/graytabby/oeedlogdblmphdbejckbhgdiohpkiaij" target="_blank"><img src="https://imgur.com/3C4iKO0.png" width="64" height="64"></a>
+<a href="https://chrome.google.com/webstore/detail/graytabby/oeedlogdblmphdbejckbhgdiohpkiaij" target="_blank"><img src="https://imgur.com/z8yjLZ2.png" width="64" height="64"></a>
+<a href="https://addons.opera.com/en/extensions/details/install-chrome-extensions/" target="_blank"><img src="https://imgur.com/nSJ9htU.png" width="64" height="64"></a>
+<a href="https://github.com/moribellamy/graytabby/releases" target="_blank"><img src="https://imgur.com/Dy442GK.png" width="64" height="64"></a>
+
 # Why GrayTabby
 * GrayTabby is _simple_. It focuses around one core flow: archival. Most users will get all the value they need out of this tab archiver by clicking one button.
 * GrayTabby is _open source_. You can read for yourself that it doesn't share your data. You can contribute to it for everyone's benefit.
@@ -12,8 +19,5 @@ GrayTabby is a tab archiver for Chrome, Brave, Firefox, and Opera.
 # Demo
 [![GrayTabby demo](https://img.youtube.com/vi/24_mo9sSyjo/0.jpg)](https://youtu.be/24_mo9sSyjo)
 
-# Download
-You can download and install manually from the [release page](https://github.com/moribellamy/graytabby/releases). Soon GrayTabby will be in the Chrome/FireFox web extension stores.
-
 # Licensing
 The source code is [MIT](LICENSE). Some images are [only allowed for distribution with GrayTabby](assets/img/blobbycat/LICENSE), so derivative works may not use them.