chore(docs): update info about extension support in Firefox

Change-Id: I0524e7c7c3842fab53b7b8199dcfcf4b63068232
diff --git a/README.md b/README.md
index a8f4fc7..b71f5e2 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,5 @@
 # TW Power Tools
-[![Available in the Chrome Web Store](docs/resources/ChromeWebStore_Badge_v2_206x58.png)](https://chrome.google.com/webstore/detail/infinite-scroll-in-tw/hpgakoecmgibigdbnljgecablpipbajb)
+[![Available in the Chrome Web Store](docs/resources/ChromeWebStore_Badge_v2_206x58.png)][chrome-download] [![Get the add-on for Firefox](docs/resources/get-the-addon-178x60px.dad84b42.png)][firefox-download]
 
 [![Build status](https://zuul.corp.avm99963.com/api/tenant/gerrit/badge?project=infinitegforums&pipeline=nightly-build)](https://zuul.corp.avm99963.com/t/gerrit/buildsets?project=infinitegforums&pipeline=nightly-build) [![Translation status](https://i18n.avm99963.com/widgets/tw-power-tools/-/svg-badge.svg)](https://i18n.avm99963.com/engage/tw-power-tools/)
 
@@ -34,3 +34,6 @@
 
 The beta channel for Chrome is available
 [here](https://chrome.google.com/webstore/detail/infinite-scroll-in-tw-bet/memmklnkkhifmflmidnflfcdepamljef).
+
+[chrome-download]: https://chrome.google.com/webstore/detail/infinite-scroll-in-tw/hpgakoecmgibigdbnljgecablpipbajb
+[firefox-download]: https://addons.mozilla.org/addon/tw-power-tools/
diff --git a/docs/install_on_firefox_for_android.es.md b/docs/install_on_firefox_for_android.es.md
index 4bc725f..fb0d67e 100644
--- a/docs/install_on_firefox_for_android.es.md
+++ b/docs/install_on_firefox_for_android.es.md
@@ -2,18 +2,10 @@
 
 # Instala la extensión en Firefox para Android
 
-Se ha añadido soporte experimental para las extensiones en Firefox para Android
-Nightly. Así pues, si quieres ejecutar la extensión en tu dispositivo Android,
-puedes hacerlo instalando
-[Firefox Nightly](https://play.google.com/store/apps/details?id=org.mozilla.fenix)
-y siguiendo los siguientes pasos:
+Puedes instalar la extensión visitando el siguiente enlace en tu dispositivo, o
+buscando "Herramientas avanzadas para TW" en la tienda de add-ons:
 
-- [Expanded extension support in Firefox for Android Nightly](https://blog.mozilla.org/addons/2020/09/29/expanded-extension-support-in-firefox-for-android-nightly/) (_en inglés_)
-
-Las instrucciones mencionan que debes crear una colección que incluya las
-extensiones que quieres instalar en tu Android. Si no quieres crear tu propia
-colección, puedes usar la que he creado solo para esta extensión. Mi ID de
-usuario es `16207307` y el nombre de la colección es `twpt`.
+- https://addons.mozilla.org/addon/tw-power-tools/
 
 *** note
 **Nota:** Para acceder la página de configuración, ve al _menú de Firefox_ >
@@ -21,5 +13,5 @@
 TW_ > _Ajustes_.
 
 Si algo no funciona bien, por favor
-[informa de ello en GitHub](https://github.com/avm99963/infinitegforums/issues/new).
+[informa de ello en Monorail](https://iavm.xyz/b/twpowertools/new).
 ***
diff --git a/docs/install_on_firefox_for_android.md b/docs/install_on_firefox_for_android.md
index 749884a..7c89bf9 100644
--- a/docs/install_on_firefox_for_android.md
+++ b/docs/install_on_firefox_for_android.md
@@ -2,23 +2,15 @@
 
 # Install the extension on Firefox for Android
 
-Experimental extension support has been recently enabled in the Firefox for
-Android Nightly. Therefore, if you want to run the extension on your Android
-device, you can do so by installing
-[Firefox Nightly](https://play.google.com/store/apps/details?id=org.mozilla.fenix)
-and following these steps:
+You can install the extension by visiting the following link in your device or
+by searching "TW Power Tools" in the add-ons store.
 
-- [Expanded extension support in Firefox for Android Nightly](https://blog.mozilla.org/addons/2020/09/29/expanded-extension-support-in-firefox-for-android-nightly/)
-
-The instructions state you should create a collection to include the extensions
-you want to make available to install. If you don't want to create your own, you
-can use the collection I have created just for this extension. My user ID is
-`16207307` and the collection name is `twpt`.
+- https://addons.mozilla.org/addon/tw-power-tools/
 
 *** note
 **Note:** In order to access the options page, go to the _Firefox menu_ >
 _Add-ons_ > _Add-ons Manager_ > _TW Power Tools_ > _Settings_.
 
 If something is not working right, please
-[report it at GitHub](https://github.com/avm99963/infinitegforums/issues/new).
+[report it at Monorail](https://iavm.xyz/b/twpowertools/new).
 ***
diff --git a/docs/resources/get-the-addon-178x60px.dad84b42.png b/docs/resources/get-the-addon-178x60px.dad84b42.png
new file mode 100644
index 0000000..f640023
--- /dev/null
+++ b/docs/resources/get-the-addon-178x60px.dad84b42.png
Binary files differ