diff --git a/src/plugins/topbar/topbar.jsx b/src/plugins/topbar/topbar.jsx
index 3549ece5..9dc07ba4 100644
--- a/src/plugins/topbar/topbar.jsx
+++ b/src/plugins/topbar/topbar.jsx
@@ -87,7 +87,8 @@ export default class Topbar extends React.Component {
 
     if(urls && urls.length) {
       var targetIndex = this.state.selectedIndex
-      let primaryName = configs["urls.primaryName"]
+      let search = parseSearch()
+      let primaryName = search["urls.primaryName"] || configs["urls.primaryName"]
       if(primaryName)
       {
         urls.forEach((spec, i) => {
diff --git a/test/e2e-cypress/static/pages/multiple-urls/index.html b/test/e2e-cypress/static/pages/multiple-urls/index.html
new file mode 100644
index 00000000..e7d47542
--- /dev/null
+++ b/test/e2e-cypress/static/pages/multiple-urls/index.html
@@ -0,0 +1,80 @@
+<!-- HTML for dev server -->
+<!DOCTYPE html>
+<html lang="en">
+<head>
+  <meta charset="UTF-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1">
+  <title>Swagger UI</title>
+  <link rel="stylesheet" type="text/css" href="/swagger-ui.css" >
+  <link rel="icon" type="image/png" href="/favicon-32x32.png" sizes="32x32" />
+  <link rel="icon" type="image/png" href="/favicon-16x16.png" sizes="16x16" />
+  <style>
+    html
+    {
+      box-sizing: border-box;
+      overflow: -moz-scrollbars-vertical;
+      overflow-y: scroll;
+    }
+    *,
+    *:before,
+    *:after
+    {
+      box-sizing: inherit;
+    }
+    body {
+      margin:0;
+      background: #fafafa;
+    }
+  </style>
+</head>
+
+<body>
+
+<div id="swagger-ui"></div>
+
+<script src="/swagger-ui-bundle.js" charset="UTF-8"> </script>
+<script src="/swagger-ui-standalone-preset.js" charset="UTF-8"> </script>
+<script>
+  window.onload = function() {
+    window["SwaggerUIBundle"] = window["swagger-ui-bundle"]
+    window["SwaggerUIStandalonePreset"] = window["swagger-ui-standalone-preset"]
+    // Build a system
+    const ui = SwaggerUIBundle({
+      urls: [
+        { name: "Petstore OAS", url: "/documents/petstore-expanded.openapi.yaml" },
+        { name: "Petstore Swagger", url: "/documents/petstore.swagger.yaml" }
+      ],
+      dom_id: '#swagger-ui',
+      presets: [
+        SwaggerUIBundle.presets.apis,
+        SwaggerUIStandalonePreset
+      ],
+      plugins: [
+        SwaggerUIBundle.plugins.DownloadUrl
+      ],
+      layout: "StandaloneLayout",
+      onComplete: () => {
+        if(window.completeCount) {
+          window.completeCount++
+        } else {
+          window.completeCount = 1
+        }
+      },
+      queryConfigEnabled: false,
+    })
+
+    window.ui = ui
+
+    ui.initOAuth({
+      clientId: "your-client-id",
+      clientSecret: "your-client-secret-if-required",
+      realm: "your-realms",
+      appName: "your-app-name",
+      scopeSeparator: " ",
+      additionalQueryStringParams: {}
+    })
+  }
+</script>
+</body>
+
+</html>
diff --git a/test/e2e-cypress/tests/features/plugins/topbar/linking-to-configured-urls.js b/test/e2e-cypress/tests/features/plugins/topbar/linking-to-configured-urls.js
new file mode 100644
index 00000000..fc24aac0
--- /dev/null
+++ b/test/e2e-cypress/tests/features/plugins/topbar/linking-to-configured-urls.js
@@ -0,0 +1,23 @@
+describe("Loading specs by url.primaryName param", () => {
+  describe("with no param", () => {
+    it("should load the default spec", () => {
+      cy.visit("/pages/multiple-urls/index.html")
+      .get("span.url")
+      .contains("/documents/petstore-expanded.openapi.yaml")
+    })
+  })
+  describe("with an invalid param", () => {
+    it("should fall back to the default spec", () => {
+      cy.visit("/pages/multiple-urls/index.html?urls.primaryName=undefinedUrlName")
+      .get("span.url")
+      .contains("/documents/petstore-expanded.openapi.yaml")
+    })
+  })
+  describe("with a valid url.primaryName param", () => {
+    it("should render the requested spec", () => {
+      cy.visit("/pages/multiple-urls/index.html?urls.primaryName=Petstore Swagger")
+      .get("span.url")
+      .contains("/documents/petstore.swagger.yaml")
+    })
+  })
+})
