fix: Dockerfile for Firefox (microsoft#1937)

mxschmitt · web-flow · commit b516ac4fb233 · 2020-04-23T08:43:53.000-07:00
diff --git a/docs/docker/Dockerfile.bionic b/docs/docker/Dockerfile.bionic
@@ -39,7 +39,8 @@ RUN apt-get install -y libnss3 \
 
 # 4. Install Firefox dependencies
 
-RUN apt-get install -y libdbus-glib-1-2
+RUN apt-get install -y libdbus-glib-1-2 \
+                       libxt6
 
 # 5. Install ffmpeg to bring in audio and video codecs necessary for playing videos in Firefox.
 
