diff --git a/calibre_web/CHANGELOG.md b/calibre_web/CHANGELOG.md
index bd07964f26..13ad1f232a 100644
--- a/calibre_web/CHANGELOG.md
+++ b/calibre_web/CHANGELOG.md
@@ -1,4 +1,8 @@
  
+## 0.6.27.3 (2026-08-30)
+- Doc: explain in the README that Calibre-Web's optional extras (metadata, kobo, gdrive, gmail, goodreads, ldap, oauth, comics) are already installed by the LinuxServer base image, that `pip install calibreweb[...]` inside the container is useless and not persistent, and that the cover fields on the Edit Metadata page are gated on `Enable Uploads` plus the user's `Upload` permission (https://github.com/alexbelgium/hassio-addons/issues/1143)
+- Fix: remove the Dockerfile step that claimed to install the Calibre binaries into `/opt/calibre`. There is no `wget` in the image, so the command failed silently and left the layer empty; the binaries are and were provided at start by the default `linuxserver/mods:universal-calibre` docker mod
+
 ## 0.6.27.2 (2026-08-23)
 - Fix: trust the whole supervisor network range for the ingress auth header instead of the addon's own address, which changes across restarts. The list is only written when that range is missing, so an entry added in the calibre-web admin page is no longer erased on every start (https://github.com/alexbelgium/hassio-addons/pull/3010)
 
diff --git a/calibre_web/Dockerfile b/calibre_web/Dockerfile
index 9b564feedb..5d68439cf1 100644
--- a/calibre_web/Dockerfile
+++ b/calibre_web/Dockerfile
@@ -35,11 +35,9 @@ RUN \
     && echo '#!/bin/sh' > /usr/bin/xdg-desktop-menu && chmod +x /usr/bin/xdg-desktop-menu \
     && echo '#!/bin/sh' > /usr/bin/xdg-mime && chmod +x /usr/bin/xdg-mime
 
-# Install calibre binaries (provides calibredb required for book downloads)
-# hadolint ignore=DL4006
-RUN \
-    wget -nv -O- https://download.calibre-ebook.com/linux-installer.sh | sh /dev/stdin install_dir=/opt/calibre
-ENV PATH="/opt/calibre:${PATH}"
+# By default the calibre binaries (calibredb, ebook-convert, ebook-meta) are installed at start by
+# the linuxserver/mods:universal-calibre docker mod, set as the default DOCKER_MODS in config.yaml.
+# The xdg-* stubs above keep its calibre_postinstall step quiet.
 
 # Global LSIO modifications
 COPY ha_lsio.sh /ha_lsio.sh
diff --git a/calibre_web/README.md b/calibre_web/README.md
index 3411c55bb7..9de33bf06b 100644
--- a/calibre_web/README.md
+++ b/calibre_web/README.md
@@ -97,6 +97,18 @@ This addon supports mounting both local drives and remote SMB shares:
 - **Local drives**: See [Mounting Local Drives in Addons](https://github.com/alexbelgium/hassio-addons/wiki/Mounting-Local-Drives-in-Addons)
 - **Remote shares**: See [Mounting Remote Shares in Addons](https://github.com/alexbelgium/hassio-addons/wiki/Mounting-remote-shares-in-Addons)
 
+### Optional Calibre-Web features
+
+Calibre-Web documents optional extras that a manual installation adds with `pip install calibreweb[metadata]` and similar. **You do not need to install anything here**: the LinuxServer base image this add-on builds on installs Calibre-Web's `requirements.txt` *and* its full `optional-requirements.txt` into the application's virtualenv, so the gdrive, gmail, goodreads, ldap, oauth, metadata, comics and kobo dependencies are all present already. Running `pip install calibreweb[...]` inside the container is not a supported way to enable them: it installs the PyPI distribution of Calibre-Web over an installation that already has those dependencies, and it can disturb the versions the base image pinned. It is also thrown away, because the Supervisor recreates the add-on container on restart.
+
+Optional features are switched on in the Calibre-Web web interface, not in the add-on options, under `Admin` -> `Basic Configuration` -> `Feature Configuration` (for example `Enable Uploads`, `Enable Kobo sync`, `Use Goodreads`).
+
+**Book covers.** The `Fetch Cover from URL` and `Upload Cover from Local Disk` fields only appear on a book's `Edit Metadata` page when `Enable Uploads` is ticked in `Feature Configuration` **and** the logged-in user has the `Upload` permission (`Admin` -> the user -> `Upload`). A missing Python package is not what hides them.
+
+**Conversion, metadata embedding and the other Calibre integrations** use command-line binaries such as `ebook-convert`, `ebook-meta` and `calibredb`. Those are installed at start by the `linuxserver/mods:universal-calibre` docker mod, which is the shipped default of the `DOCKER_MODS` option. If you set `DOCKER_MODS` yourself, keep `linuxserver/mods:universal-calibre` in the list (mods are separated by `|`) or those binaries disappear.
+
+**Other compatible Python packages** can be installed from the add-on's custom script (see the section below); `pip` there points at Calibre-Web's own virtualenv. Such a script runs on every start, and it has to, since the container's writable layer does not persist.
+
 ### Custom Scripts and Environment Variables
 
 This addon supports custom scripts and environment variables:
diff --git a/calibre_web/config.yaml b/calibre_web/config.yaml
index fdce14d9db..0c23004c1a 100644
--- a/calibre_web/config.yaml
+++ b/calibre_web/config.yaml
@@ -116,5 +116,5 @@ schema:
 slug: calibre-web
 udev: true
 url: https://github.com/alexbelgium/hassio-addons/tree/master/calibre_web
-version: "0.6.27.2"
+version: "0.6.27.3"
 video: true