diff --git a/Makefile.extra b/Makefile.extra
index 3be2fc5..e368bc1 100644
--- a/Makefile.extra
+++ b/Makefile.extra
@@ -1,4 +1,5 @@
 #!/usr/bin/make
+# please update doc/md/packages/extras.md after adding changes to this file
 WGET=wget --continue --no-verbose --show-progress --directory-prefix=cache/downloads/
 
 all: download_extra
diff --git a/README.md b/README.md
index 0e7cc4c..ae97a24 100644
--- a/README.md
+++ b/README.md
@@ -35,6 +35,7 @@ This repository contains the `live-build` configuration and scripts used to buil
 - [Software: System](doc/md/packages/system.md)
 - [Software: Development](doc/md/packages/development.md)
 - [Software: Games](doc/md/packages/games.md)
+- [Software: Extras](doc/md/packages/extras.md)
 - [Changelog](CHANGELOG.md)
 
 
diff --git a/doc/md/index.md b/doc/md/index.md
index 0e17d93..9e63cd7 100644
--- a/doc/md/index.md
+++ b/doc/md/index.md
@@ -35,6 +35,7 @@ This repository contains the `live-build` configuration and scripts used to buil
 - [Software: System](packages/system.md)
 - [Software: Development](packages/development.md)
 - [Software: Games](packages/games.md)
+- [Software: Extras](packages/extras.md)
 - [Changelog](CHANGELOG.md)
 
 
diff --git a/doc/md/packages/extras.md b/doc/md/packages/extras.md
new file mode 100644
index 0000000..2be7a20
--- /dev/null
+++ b/doc/md/packages/extras.md
@@ -0,0 +1,16 @@
+
+### Extras
+
+For convenience, some software that are not part of the official Debian distribution is included in the live system/installer. These components are listed in [Makefile.extra](https://gitlab.com/nodiscc/debian-live-config/-/blob/master/Makefile.extra):
+
+<!-- grep '# EXTRA' Makefile.extra -->
+
+ - https://github.com/scopatz/nanorc
+ - https://github.com/az0/cleanerml
+ - https://github.com/nodiscc/user.js
+ - https://github.com/EionRobb/pidgin-opensteamworks/
+ - https://github.com/yt-dlp/yt-dlp
+ - https://addons.mozilla.org/en-US/firefox/addon/keepassxc-browser/
+ - https://addons.mozilla.org/en-US/firefox/addon/cookie-autodelete/
+
+These components are not installed from APT repositories and will receive no automatic updates unless someone [packages and uploads them](https://wnpp.debian.net/) to the Debian archive. Please refer to each component's documentation for manual upgrade instructions.