diff --git a/aio/src/extra-files/README.md b/aio/src/extra-files/README.md
index 2aad208a30..55a09439bf 100644
--- a/aio/src/extra-files/README.md
+++ b/aio/src/extra-files/README.md
@@ -6,4 +6,8 @@ After the AIO application had been built and before it is deployed all files and
 inside the folder with the same name as the current deployment mode (next, stable, archive)
 will be copied to the `dist` folder.
 
-See the `scripts/deploy-to-firebase.sh` script for more detail.
\ No newline at end of file
+See the `scripts/deploy-to-firebase.sh` script for more detail.
+
+**Note:**
+The `deploy-to-firebase.sh` script always expects there to be a folder for the current deployment
+mode (even if it is empty).
diff --git a/aio/src/extra-files/archive/robots.txt b/aio/src/extra-files/archive/robots.txt
index 77470cb39f..35272cac72 100644
--- a/aio/src/extra-files/archive/robots.txt
+++ b/aio/src/extra-files/archive/robots.txt
@@ -1,2 +1,3 @@
+# Disallow all URLs (see http://www.robotstxt.org/robotstxt.html)
 User-agent: *
-Disallow: /
\ No newline at end of file
+Disallow: /
diff --git a/aio/src/extra-files/next/robots.txt b/aio/src/extra-files/next/robots.txt
index 77470cb39f..35272cac72 100644
--- a/aio/src/extra-files/next/robots.txt
+++ b/aio/src/extra-files/next/robots.txt
@@ -1,2 +1,3 @@
+# Disallow all URLs (see http://www.robotstxt.org/robotstxt.html)
 User-agent: *
-Disallow: /
\ No newline at end of file
+Disallow: /
diff --git a/aio/src/extra-files/stable/robots.txt b/aio/src/extra-files/stable/robots.txt
new file mode 100644
index 0000000000..7dbb786bc6
--- /dev/null
+++ b/aio/src/extra-files/stable/robots.txt
@@ -0,0 +1,3 @@
+# Allow all URLs (see http://www.robotstxt.org/robotstxt.html)
+User-agent: *
+Disallow: