diff --git a/toolkit/themes/linux/global/in-content/info-pages.css b/toolkit/themes/linux/global/in-content/info-pages.css
new file mode 100644
index 000000000000..a25b9f6a3d8e
--- /dev/null
+++ b/toolkit/themes/linux/global/in-content/info-pages.css
@@ -0,0 +1 @@
+%include ../../../shared/in-content/info-pages.inc.css
\ No newline at end of file
diff --git a/toolkit/themes/linux/global/jar.mn b/toolkit/themes/linux/global/jar.mn
index 509fb6399102..83102cc50364 100644
--- a/toolkit/themes/linux/global/jar.mn
+++ b/toolkit/themes/linux/global/jar.mn
@@ -56,6 +56,7 @@ toolkit.jar:
 +  skin/classic/global/icons/webapps-64.png                    (icons/webapps-64.png)
    skin/classic/global/menu/shared-menu-check.png              (../../shared/menu-check.png)
 *  skin/classic/global/in-content/common.css                   (in-content/common.css)
+*  skin/classic/global/in-content/info-pages.css               (in-content/info-pages.css)
    skin/classic/global/in-content/check.svg                    (../../shared/in-content/check.svg)
    skin/classic/global/in-content/dropdown.svg                 (../../shared/in-content/dropdown.svg)
    skin/classic/global/in-content/help-glyph.svg               (../../shared/in-content/help-glyph.svg)
diff --git a/toolkit/themes/osx/global/in-content/info-pages.css b/toolkit/themes/osx/global/in-content/info-pages.css
new file mode 100644
index 000000000000..a25b9f6a3d8e
--- /dev/null
+++ b/toolkit/themes/osx/global/in-content/info-pages.css
@@ -0,0 +1 @@
+%include ../../../shared/in-content/info-pages.inc.css
\ No newline at end of file
diff --git a/toolkit/themes/osx/global/jar.mn b/toolkit/themes/osx/global/jar.mn
index 13e7d8c8eb2f..cc2bae680217 100644
--- a/toolkit/themes/osx/global/jar.mn
+++ b/toolkit/themes/osx/global/jar.mn
@@ -187,6 +187,7 @@ toolkit.jar:
   skin/classic/global/menu/shared-menu-check.png                     (../../shared/menu-check.png)
   skin/classic/global/menu/shared-menu-check@2x.png                  (../../shared/menu-check@2x.png)
 * skin/classic/global/in-content/common.css                          (in-content/common.css)
+* skin/classic/global/in-content/info-pages.css                      (in-content/info-pages.css)
   skin/classic/global/in-content/check.svg                           (../../shared/in-content/check.svg)
   skin/classic/global/in-content/dropdown.svg                        (../../shared/in-content/dropdown.svg)
   skin/classic/global/in-content/help-glyph.svg                      (../../shared/in-content/help-glyph.svg)
diff --git a/toolkit/themes/shared/in-content/info-pages.inc.css b/toolkit/themes/shared/in-content/info-pages.inc.css
new file mode 100644
index 000000000000..9c13a1c38f15
--- /dev/null
+++ b/toolkit/themes/shared/in-content/info-pages.inc.css
@@ -0,0 +1,85 @@
+@import url("chrome://global/skin/in-content/common.css");
+/* Body and container */
+body {
+  display: flex;
+  box-sizing: padding-box;
+  min-height: 100vh;
+  padding-top: 0;
+  padding-bottom: 0;
+  -moz-padding-start: calc(48px + 4.6em);
+  -moz-padding-end: 48px;
+  align-items: center;
+  justify-content: center;
+}
+
+.container {
+  min-width: 13em;
+  max-width: 52em;
+}
+
+/* Typography */
+.title {
+  background-image: url("chrome://browser/skin/aboutNetError_info.svg");
+  background-position: left 0;
+  background-repeat: no-repeat;
+  background-size: auto;
+  -moz-margin-start: -2.3em;
+  -moz-padding-start: 2.3em;
+  font-size: 2.5em;
+}
+
+.title:-moz-dir(rtl) {
+  background-position: right 0;
+}
+
+.title-text {
+  border-bottom: 1px solid #C1C1C1;
+  font-size: inherit;
+  padding-bottom: 0.4em;
+}
+
+@media (max-width: 675px) {
+  body {
+    padding: 0 48px;
+  }
+
+  .title {
+    background-image: none !important;
+    -moz-padding-start: 0;
+    -moz-margin-start: 0;
+  }
+
+  .title-text {
+    padding-top: 0;
+  }
+}
+
+ul, ol {
+  margin: 0;
+  padding: 0;
+  -moz-margin-start: 1em;
+}
+
+ul > li, ol > li {
+  margin-bottom: .5em;
+}
+
+ul {
+  list-style: disc;
+}
+
+/* Buttons */
+.button-container {
+  margin-top: 1.2em;
+}
+
+.button-container > button {
+  min-width: 150px;
+}
+
+/* Trees */
+tree {
+  min-height: 12em;
+  margin-top: 1.2em;
+  width: 100%;
+}
\ No newline at end of file
diff --git a/toolkit/themes/windows/global/in-content/info-pages.css b/toolkit/themes/windows/global/in-content/info-pages.css
new file mode 100644
index 000000000000..a25b9f6a3d8e
--- /dev/null
+++ b/toolkit/themes/windows/global/in-content/info-pages.css
@@ -0,0 +1 @@
+%include ../../../shared/in-content/info-pages.inc.css
\ No newline at end of file
diff --git a/toolkit/themes/windows/global/jar.mn b/toolkit/themes/windows/global/jar.mn
index c05b76ca7bdf..299a47cade35 100644
--- a/toolkit/themes/windows/global/jar.mn
+++ b/toolkit/themes/windows/global/jar.mn
@@ -172,6 +172,7 @@ toolkit.jar:
         skin/classic/global/media/videoClickToPlayButton.svg     (media/videoClickToPlayButton.svg)
         skin/classic/global/menu/shared-menu-check.png           (../../shared/menu-check.png)
 *       skin/classic/global/in-content/common.css                (in-content/common.css)
+*       skin/classic/global/in-content/info-pages.css            (in-content/info-pages.css)
         skin/classic/global/in-content/check.svg                 (../../shared/in-content/check.svg)
         skin/classic/global/in-content/dropdown.svg              (../../shared/in-content/dropdown.svg)
         skin/classic/global/in-content/help-glyph.svg            (../../shared/in-content/help-glyph.svg)
@@ -365,6 +366,7 @@ toolkit.jar:
         skin/classic/aero/global/media/videoClickToPlayButton.svg        (media/videoClickToPlayButton.svg)
         skin/classic/aero/global/menu/shared-menu-check.png              (../../shared/menu-check.png)
 *       skin/classic/aero/global/in-content/common.css                   (in-content/common.css)
+*       skin/classic/aero/global/in-content/info-pages.css               (in-content/info-pages.css)
         skin/classic/aero/global/in-content/check.svg                    (../../shared/in-content/check.svg)
         skin/classic/aero/global/in-content/dropdown.svg                 (../../shared/in-content/dropdown.svg)
         skin/classic/aero/global/in-content/help-glyph.svg               (../../shared/in-content/help-glyph.svg)