--- a/browser/base/content/aboutNetError.xhtml
+++ b/browser/base/content/aboutNetError.xhtml
@@ -157,17 +157,20 @@
         if (cssClass == "badStsCert") {
           document.getElementById("badStsCertExplanation").removeAttribute("hidden");
         }
       }
 
       function initPage() {
         var err = getErrorCode();
         // List of error pages with an illustration.
-        let illustratedErrors = ["malformedURI", "dnsNotFound"];
+        let illustratedErrors = [
+          "malformedURI", "dnsNotFound", "connectionFailure", "netInterrupt",
+          "netTimeout", "netReset", "netOffline",
+        ];
         if (illustratedErrors.includes(err)) {
           document.body.classList.add("illustrated", err);
         }
 
         gIsCertError = (err == "nssBadCert");
         // Only worry about captive portals if this is a cert error.
         let showCaptivePortalUI = isCaptive() && gIsCertError;
         if (showCaptivePortalUI) {

new file mode 100644
--- /dev/null
+++ b/browser/base/content/illustrations/error-connection-failure.svg
@@ -0,0 +1,49 @@
+<!-- This Source Code Form is subject to the terms of the Mozilla Public
+   - License, v. 2.0. If a copy of the MPL was not distributed with this
+   - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
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+      <stop offset="1" stop-color="#c9e4ff"/>
+    </linearGradient>
+    <linearGradient id="b" x1="-18.672" y1="23.78" x2="279.805" y2="322.256" gradientUnits="userSpaceOnUse">
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+      <stop offset="1" stop-color="#0a84ff"/>
+    </linearGradient>
+  </defs>
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+    <path d="M193.225 139.669a1.412 1.412 0 0 0 1.41-1.41V135.1a1.41 1.41 0 0 0-2.821 0v3.162a1.412 1.412 0 0 0 1.411 1.407z"/>
+    <path d="M193.225 144.475a5.736 5.736 0 0 0 4.644-2.413 1 1 0 1 0-1.679-1.088 3.76 3.76 0 0 1-2.965 1.5 3.71 3.71 0 0 1-2.969-1.506 1 1 0 0 0-1.675 1.094 5.736 5.736 0 0 0 4.644 2.413z"/>
+    <path d="M163.852 142.719a1 1 0 0 0 1.674-1.094 5.674 5.674 0 0 0-9.286 0 1 1 0 0 0 1.674 1.095 3.679 3.679 0 0 1 5.938 0z"/>
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+    <path d="M160.912 130.086a5.733 5.733 0 0 0 4.643-2.412 1 1 0 0 0-1.674-1.095 3.679 3.679 0 0 1-5.937 0 1 1 0 0 0-1.674 1.094 5.733 5.733 0 0 0 4.642 2.413z"/>
+    <path d="M155.934 155.646a18.515 18.515 0 0 0-4.51-8.323c-5.144-5.145-12.507-4.867-12.817-4.857a1 1 0 0 0 .089 2 16.68 16.68 0 0 1 3.159.279 18.431 18.431 0 0 0 1.1 3.47 6.118 6.118 0 0 0-1.562.513 7.174 7.174 0 0 0-2.41 2.27.5.5 0 1 0 .84.542 6.254 6.254 0 0 1 2.014-1.917 5.319 5.319 0 0 1 1.6-.478 4.113 4.113 0 0 0 .928 1.091 6.669 6.669 0 0 0-.955 2.347 7.171 7.171 0 0 0 .372 3.29.5.5 0 0 0 .469.326.494.494 0 0 0 .174-.031.5.5 0 0 0 .295-.643 6.214 6.214 0 0 1-.326-2.76 5.734 5.734 0 0 1 .894-2.1 2.673 2.673 0 0 0 .474.054 9.686 9.686 0 0 0 4.458-1.746 16.947 16.947 0 0 1 3.75 7.1 1 1 0 0 0 1.956-.42zm-10.821-6.082c-1.027-.642-1.8-3.029-2.178-4.592a15.045 15.045 0 0 1 6.547 3.285c-1.517.943-3.507 1.843-4.37 1.307z"/>
+    <path d="M193.839 116.06a1 1 0 0 0 .71-.3l2.533-2.554a1 1 0 1 0-1.42-1.408l-2.533 2.554a1 1 0 0 0 .71 1.7z"/>
+    <path d="M199.708 117.691a1 1 0 0 0 .409-.088l3.512-1.576a1 1 0 0 0-.818-1.825l-3.512 1.576a1 1 0 0 0 .41 1.913z"/>
+    <path d="M193.882 183.558a.5.5 0 0 0 .106.988.487.487 0 0 0 .105-.011 5.176 5.176 0 0 0 3-7.9.5.5 0 0 0-.807.591 4.178 4.178 0 0 1-2.41 6.327z"/>
+    <path d="M195.435 187.387a.487.487 0 0 0 .105-.011 7.781 7.781 0 0 0 4.512-11.856.5.5 0 1 0-.807.591 6.884 6.884 0 0 1 .676 6.146 6.8 6.8 0 0 1-4.593 4.142.5.5 0 0 0 .105.989z"/>
+    <path d="M127.087 198.745a5.134 5.134 0 0 0 1.54.239 5.254 5.254 0 0 0 3.143-1.063.5.5 0 0 0-.637-.771 4.178 4.178 0 0 1-6.463-2.021.5.5 0 0 0-.962.271 5.206 5.206 0 0 0 3.379 3.345z"/>
+    <path d="M132.43 200.03a6.783 6.783 0 0 1-10.508-3.284.5.5 0 0 0-.963.27 7.773 7.773 0 0 0 12.108 3.785.5.5 0 0 0-.638-.771z"/>
+  </g>
+  <g fill="#f9f9fa">
+    <path d="M160.366 188.859a.5.5 0 0 1-.43-.754l1.345-2.283a.5.5 0 1 1 .861.508l-1.345 2.283a.5.5 0 0 1-.431.246z"/>
+    <path d="M161.086 192.527a.5.5 0 0 1-.43-.754l1.344-2.282a.5.5 0 1 1 .861.508l-1.345 2.282a.5.5 0 0 1-.43.246z"/>
+  </g>
+</svg>

--- a/browser/base/jar.mn
+++ b/browser/base/jar.mn
@@ -34,16 +34,17 @@ browser.jar:
         content/browser/abouthome/bookmarks@2x.png     (content/abouthome/bookmarks@2x.png)
         content/browser/abouthome/history@2x.png       (content/abouthome/history@2x.png)
         content/browser/abouthome/addons@2x.png        (content/abouthome/addons@2x.png)
         content/browser/abouthome/sync@2x.png          (content/abouthome/sync@2x.png)
         content/browser/abouthome/settings@2x.png      (content/abouthome/settings@2x.png)
         content/browser/abouthome/restore@2x.png       (content/abouthome/restore@2x.png)
         content/browser/abouthome/restore-large@2x.png (content/abouthome/restore-large@2x.png)
 
+        content/browser/illustrations/error-connection-failure.svg (content/illustrations/error-connection-failure.svg)
         content/browser/illustrations/error-server-not-found.svg (content/illustrations/error-server-not-found.svg)
         content/browser/illustrations/error-malformed-url.svg (content/illustrations/error-malformed-url.svg)
         content/browser/aboutNetError.xhtml            (content/aboutNetError.xhtml)
 
 #ifdef MOZ_SERVICES_HEALTHREPORT
         content/browser/abouthealthreport/abouthealth.xhtml   (content/abouthealthreport/abouthealth.xhtml)
         content/browser/abouthealthreport/abouthealth.js      (content/abouthealthreport/abouthealth.js)
         content/browser/abouthealthreport/abouthealth.css     (content/abouthealthreport/abouthealth.css)

--- a/browser/themes/shared/aboutNetError.css
+++ b/browser/themes/shared/aboutNetError.css
@@ -179,16 +179,24 @@ span#hostname {
   padding-inline-start: 38%;
 }
 
 .illustrated #errorPageContainer {
   background-repeat: no-repeat;
   background-size: 38%;
 }
 
+.connectionFailure #errorPageContainer,
+.netInterrupt #errorPageContainer,
+.netTimeout #errorPageContainer,
+.netReset #errorPageContainer,
+.netOffline #errorPageContainer {
+  background-image: url("chrome://browser/content/illustrations/error-connection-failure.svg");
+}
+
 .dnsNotFound #errorPageContainer {
   background-image: url("chrome://browser/content/illustrations/error-server-not-found.svg");
 }
 
 .malformedURI #errorPageContainer {
   background-image: url("chrome://browser/content/illustrations/error-malformed-url.svg");
 }