diff --git a/css/unsupported_browser.css b/css/unsupported_browser.css
index 75ac83c0f..847103b91 100644
--- a/css/unsupported_browser.css
+++ b/css/unsupported_browser.css
@@ -97,15 +97,15 @@ a {
 }
 #chromium_logo
 {
-    width: 77px;
+    width: 85px;
     height: 79px;
     background-image: url('/images/chromium.png');
 }
-#firefox-nightly_logo
+#firefox_logo
 {
     width: 73px;
     height: 79px;
-    background-image: url('/images/firefox-nightly.png');
+    background-image: url('/images/firefox.png');
 }
 
 #opera_logo
diff --git a/debian/jitsi-meet.postinst b/debian/jitsi-meet.postinst
index 125978243..fdf38cccc 100644
--- a/debian/jitsi-meet.postinst
+++ b/debian/jitsi-meet.postinst
@@ -45,8 +45,8 @@ case "$1" in
         # stores the hostname so we will reuse it later, like in purge
         db_set jitsi-meet/jvb-hostname $JVB_HOSTNAME
 
-        NGINX_INSTALL_CHECK="$(dpkg-query -W -f '${PackageSpec}:${Status}\n' nginx 2>&1 | grep -v "ok installed" || :)"
-        if [ -z "${NGINX_INSTALL_CHECK}" ]; then
+        NGINX_INSTALL_CHECK="$(dpkg-query -f '${Status}' -W 'nginx' 2>/dev/null | awk '{print $3}' || true)"
+        if [ "$NGINX_INSTALL_CHECK" = "installed" ] || [ "$NGINX_INSTALL_CHECK" = "unpacked" ] ; then
             FORCE_NGINX="true"
         fi
 
diff --git a/debian/jitsi-meet.postrm b/debian/jitsi-meet.postrm
index 3e199f81e..807dc38cb 100644
--- a/debian/jitsi-meet.postrm
+++ b/debian/jitsi-meet.postrm
@@ -35,6 +35,8 @@ case "$1" in
             rm -f /etc/jitsi/meet/$JVB_HOSTNAME-config.js
             rm -f /etc/nginx/sites-available/$JVB_HOSTNAME.conf
             rm -f /etc/nginx/sites-enabled/$JVB_HOSTNAME.conf
+            rm -f /etc/jitsi/videobridge/$JVB_HOSTNAME.jks
+            rm -f /etc/jitsi/videobridge/$JVB_HOSTNAME.p12
         fi
     ;;
     upgrade|failed-upgrade|abort-install|abort-upgrade|disappear)
diff --git a/unsupported_browser.html b/unsupported_browser.html
index fd4837e7b..68981fbab 100644
--- a/unsupported_browser.html
+++ b/unsupported_browser.html
@@ -35,7 +35,7 @@
         <div class="browser_wrapper">
             Firefox
             <div class="browser">
-                <div class="logo" id="firefox"></div>
+                <div class="logo" id="firefox_logo"></div>
                 <a href="http://www.getfirefox.com/"><div class="button">DOWNLOAD</div></a>
             </div>
         </div>