diff --git a/server-ce/Dockerfile-base b/server-ce/Dockerfile-base
index 929180a25b..f63cc9a8c8 100644
--- a/server-ce/Dockerfile-base
+++ b/server-ce/Dockerfile-base
@@ -44,6 +44,27 @@ RUN curl -fsSL "https://github.com/quarto-dev/quarto-cli/releases/download/v${QU
 &&  mkdir -p /var/www/.cache/quarto \
 &&  chown -R www-data:www-data /var/www/.cache
 
+# Pre-install popular Quarto extensions
+# -----------------------------------------------------------------------
+# Extensions land in /opt/quarto-extensions/_extensions/<author>/<name>/.
+# QuartoRunner copies them into each project's compile dir (no-clobber,
+# so user-uploaded extensions in their project always take precedence).
+# To add more: append another line:  && quarto add --no-prompt <author>/<repo>
+# -----------------------------------------------------------------------
+RUN mkdir -p /opt/quarto-extensions \
+&&  cd /opt/quarto-extensions \
+    \
+    # Typst document formats
+&&  quarto add --no-prompt igorlima/charged-ieee \
+    \
+    # RevealJS presentation plugins (official Quarto extensions)
+&&  quarto add --no-prompt quarto-ext/fontawesome \
+&&  quarto add --no-prompt quarto-ext/attribution \
+&&  quarto add --no-prompt quarto-ext/pointer \
+&&  quarto add --no-prompt quarto-ext/drop \
+    \
+&&  chown -R www-data:www-data /opt/quarto-extensions
+
 
 # Set up overleaf user and home directory
 # -----------------------------------------
diff --git a/services/clsi/app/js/QuartoRunner.js b/services/clsi/app/js/QuartoRunner.js
index 1a7b60bebe..ebade99ca7 100644
--- a/services/clsi/app/js/QuartoRunner.js
+++ b/services/clsi/app/js/QuartoRunner.js
@@ -62,7 +62,12 @@ function _buildQuartoCommand(mainFile) {
   // LocalCommandRunner.replace() only replaces the FIRST $COMPILE_DIR
   // occurrence in the shell string, so the mv commands use relative paths
   // instead — the shell CWD is already set to the compile directory.
+  // Merge pre-installed extensions into the compile dir before rendering.
+  // -n (no-clobber) ensures project-uploaded extensions take precedence.
+  // The semicolon means a missing /opt/quarto-extensions dir doesn't abort.
   const cmd =
+    `mkdir -p _extensions && ` +
+    `cp -rn /opt/quarto-extensions/_extensions/. _extensions/ 2>/dev/null; ` +
     `quarto render ${inputPath} --embed-resources 2>&1 && ` +
     `(mv ${baseName}.pdf output.pdf 2>/dev/null || ` +
     `mv ${baseName}.html output.html 2>/dev/null)`