misc improvments

.docker/files/chromium/Dockerfile

@@ -14,7 +14,6 @@ RUN set -eux; apt-get update; \
     #
     # clean up
     apt-get --purge autoremove -y unzip; \
-    apt-get autoremove -y; \
     apt-get clean -y; \
     rm -rf /var/lib/apt/lists/* /var/cache/apt/*
 

.docker/files/chromium/policies.json

@@ -25,12 +25,14 @@
       "chrome://policy"
   ],
   "ExtensionInstallWhitelist": [
-      "cjpalhdlnbpafiamejdnhcphjbkeiagm"
+      "cjpalhdlnbpafiamejdnhcphjbkeiagm",
+      "fjoaledfpmneenckfbpdfhkmimnjocfa"
   ],
   "ExtensionInstallBlacklist": [
       "*"
   ],
   "ExtensionInstallForcelist": [
-      "cjpalhdlnbpafiamejdnhcphjbkeiagm"
+      "cjpalhdlnbpafiamejdnhcphjbkeiagm",
+      "fjoaledfpmneenckfbpdfhkmimnjocfa"
   ]
 }