diff --git a/theme/shared/browser/extensions/extensions.inc.css b/theme/shared/browser/extensions/extensions.inc.css
index 2ba37e51..07894f24 100644
--- a/theme/shared/browser/extensions/extensions.inc.css
+++ b/theme/shared/browser/extensions/extensions.inc.css
@@ -46,6 +46,7 @@
 % P
 %include pinboard-extension.inc.css
 %include pocket.inc.css
+%include private-tab.inc.css
 %include pushbullet.inc.css
 
 % R
diff --git a/theme/shared/browser/extensions/private-tab.inc.css b/theme/shared/browser/extensions/private-tab.inc.css
new file mode 100644
index 00000000..9850a24d
--- /dev/null
+++ b/theme/shared/browser/extensions/private-tab.inc.css
@@ -0,0 +1,23 @@
+%if 0
+/* Private Tab
+ * id: privateTab@infocatcher
+ * URL: https://addons.mozilla.org/firefox/addon/private-tab/ */
+%endif
+
+#privateTab-toolbar-openNewPrivateTab > .toolbarbutton-icon {
+  list-style-image: url(chrome://symbolic-icons/skin/extensions/private-tab.svg) !important;
+}
+
+#main-window[darkvariant] #privateTab-toolbar-openNewPrivateTab[cui-areatype="toolbar"] > .toolbarbutton-icon {
+  filter: url(chrome://browser/skin/symbolic-icons-colors.svg#white);
+}
+
+#privateTab-toolbar-openNewPrivateTab[cui-areatype="menu-panel"] > .toolbarbutton-icon,
+toolbarpaletteitem[place="palette"] > #privateTab-toolbar-openNewPrivateTab > .toolbarbutton-icon {
+  opacity: 0.6;
+}
+
+#main-window[darkvariant="full"] #privateTab-toolbar-openNewPrivateTab[cui-areatype="menu-panel"] > .toolbarbutton-icon {
+  filter: url(chrome://browser/skin/symbolic-icons-colors.svg#white);
+  opacity: 0.8;
+}
diff --git a/theme/shared/symbolic-icons/extensions/private-tab.svg b/theme/shared/symbolic-icons/extensions/private-tab.svg
new file mode 100644
index 00000000..278d3f5b
--- /dev/null
+++ b/theme/shared/symbolic-icons/extensions/private-tab.svg
@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+
+<svg
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   version="1.1"
+   width="16"
+   height="16">
+  <g>
+    <path
+       d="m 0,5 c 0,2 0,8 4.5714301,8 2.28571,0 3.42857,-2 3.42857,-2 0,0 1.14286,2 3.4285699,2 C 16,13 16,7 16,5 14.85714,6 13.71429,6 11.42857,6 9.1428601,6 8.0000001,7.9999996 8.0000001,7.9999996 8.0000001,7.9999996 6.8571401,6 4.5714301,6 2.2857101,6 1.1428601,6 0,5 z m 4.0357101,3.3749996 c 0.30032,-0.0177 0.61848,-0.0271 0.96429,0 0.90509,0.0718 1.07322,0.6541304 2.25,1.2187504 -1.34488,0.53143 -1.38473,0.6875 -2.67857,0.6875 -1.29384,0 -1.33369,-0.81231 -2.67857,-1.3437504 0.53845,-0.25795 1.24191,-0.5079 2.14285,-0.5625 z m 6.9642899,0 c 0.34581,-0.0271 0.66397,-0.0177 0.96429,0 0.90094,0.0546 1.6044,0.30455 2.14285,0.5625 -1.34488,0.5314404 -1.38473,1.3437504 -2.67857,1.3437504 -1.29384,0 -1.33369,-0.15607 -2.6785699,-0.6875 C 9.9267796,9.02913 10.09491,8.4467996 11,8.3749996 z"
+       id="mask"
+       style="fill:#2e3436;fill-opacity:1;stroke:none" />
+    <path
+       d="m 0,14 0,-2 1,0 2,2 0,0 z"
+       id="path4311"
+       style="fill:#2e3436;fill-opacity:1;stroke:none" />
+    <path
+       d="m 16,14 0,-2 -1,0 -2,2 0,0 z"
+       id="path4313"
+       style="fill:#2e3436;fill-opacity:1;stroke:none" />
+    <path
+       d="M 3,2 C 1.8954305,2 1.0000001,2.8954305 1,4 c 1e-7,0.5522847 0.8954305,1 2,1 L 3,4 13,4 13,5 C 14.104569,5 15,4.5522847 15,4 15,2.8954305 14.104569,2 13,2 L 3,2 z"
+       id="path4317"
+       style="fill:#2e3436;fill-opacity:1;stroke:none" />
+  </g>
+</svg>