diff --git a/src/Controller/BrowserController.php b/src/Controller/BrowserController.php
index 8fd8a4be9eabff8d0a859128f42c38dfdf6dee21..086ab92b8175ba28ce7489e817f4cc92bc82e8b6 100644
--- a/src/Controller/BrowserController.php
+++ b/src/Controller/BrowserController.php
@@ -9,7 +9,6 @@ use Drupal\project_browser\InstallReadiness;
 use Drupal\project_browser\MaintenanceStatus;
 use Drupal\project_browser\SecurityStatus;
 use Symfony\Component\DependencyInjection\ContainerInterface;
-use Symfony\Component\HttpFoundation\Request;
 
 // cspell:ignore ctools
 
@@ -51,13 +50,11 @@ class BrowserController extends ControllerBase {
    * @param string|null $id
    *   If viewing a specific project, the project's local ID (as known to the
    *   source plugin).
-   * @param \Symfony\Component\HttpFoundation\Request $request
-   *   The current request.
    *
    * @return array
    *   A render array.
    */
-  public function browse(?string $source, ?string $id, Request $request): array {
+  public function browse(?string $source, ?string $id): array {
     $current_sources = $this->enabledSource->getCurrentSources();
     $ui_install_enabled = (bool) $this->config('project_browser.admin_settings')->get('allow_ui_install') && is_object($this->installReadiness);
 
@@ -106,7 +103,6 @@ class BrowserController extends ControllerBase {
           'project_browser' => [
             'active_plugins' => $active_plugins,
             'module_path' => $this->moduleHandler()->getModule('project_browser')->getPath(),
-            'origin_url' => $request->getSchemeAndHttpHost() . $request->getBaseUrl(),
             'special_ids' => $this->getSpecialIds(),
             'sort_options' => $sort_options,
             'maintenance_options' => MaintenanceStatus::asOptions(),
diff --git a/sveltejs/public/build/bundle.js b/sveltejs/public/build/bundle.js
index 2df11e7f959ed862d08e1fe3f179b25d0224a93d..45fe7eac640958ab74619e3ad8eede5e3da73758 100644
Binary files a/sveltejs/public/build/bundle.js and b/sveltejs/public/build/bundle.js differ
diff --git a/sveltejs/public/build/bundle.js.map b/sveltejs/public/build/bundle.js.map
index eaba9e4dce5aac7c51e0614d0a96e52744220aa0..98f6940379942eb891ddfd46236c3d3f825a0565 100644
Binary files a/sveltejs/public/build/bundle.js.map and b/sveltejs/public/build/bundle.js.map differ
diff --git a/sveltejs/src/App.svelte b/sveltejs/src/App.svelte
index 04f69fd202b99b16b363033f0b62be6a2e1e2de6..005f3f6795a29832f0e1ead31620cd9b1323d054 100644
--- a/sveltejs/src/App.svelte
+++ b/sveltejs/src/App.svelte
@@ -3,12 +3,12 @@
   import ModulePage from './ModulePage.svelte';
   import Loading from './Loading.svelte';
   import { activeTab } from './stores';
-  import { ORIGIN_URL } from './constants';
 
   const matches = window.location.pathname.match(
     /\/admin\/modules\/browse\/(.+)/,
   );
   const projectId = matches ? matches[1] : null;
+  const { Drupal } = window;
 
   let loading = true;
   let project = [];
@@ -35,7 +35,7 @@
 {#if !projectId}
   <ProjectBrowser />
 {:else}
-  {#await load(`${ORIGIN_URL}/drupal-org-proxy/project?id=${projectId}`)}
+  {#await load(Drupal.url(`drupal-org-proxy/project?id=${projectId}`))}
     {#if loading}
       <Loading />
     {/if}
diff --git a/sveltejs/src/Filter.svelte b/sveltejs/src/Filter.svelte
index 90887a67abe904ff1e1397b14094cb66e0afbab3..9ad1d58025f66389f091513dc1dfcd0b2e79e3a3 100644
--- a/sveltejs/src/Filter.svelte
+++ b/sveltejs/src/Filter.svelte
@@ -7,7 +7,6 @@
   } from './stores';
   import MediaQuery from './MediaQuery.svelte';
   import { normalizeOptions, shallowCompare } from './util';
-  import { ORIGIN_URL } from './constants';
 
   const { Drupal } = window;
   const dispatch = createEventDispatcher();
@@ -29,7 +28,7 @@
   }
 
   async function fetchAllCategories() {
-    const response = await fetch(`${ORIGIN_URL}/drupal-org-proxy/categories`);
+    const response = await fetch(Drupal.url('drupal-org-proxy/categories'));
     if (response.ok) {
       return response.json();
     }
diff --git a/sveltejs/src/ModulePage.svelte b/sveltejs/src/ModulePage.svelte
index a70e369b5f0be8ae46f44dad467ae4b2589e675b..f16f242580e5335f58c81485502624dd4575bb2b 100644
--- a/sveltejs/src/ModulePage.svelte
+++ b/sveltejs/src/ModulePage.svelte
@@ -3,7 +3,6 @@
   import ActionButton from './Project/ActionButton.svelte';
   import Image from './Project/Image.svelte';
   import ImageCarousel from './ImageCarousel.svelte';
-  import { ORIGIN_URL } from './constants';
   import { moduleCategoryFilter, page } from './stores';
   import ProjectIcon from './Project/ProjectIcon.svelte';
   import { numberFormatter } from './util';
@@ -15,7 +14,7 @@
   function filterByCategory(id) {
     $moduleCategoryFilter = [id];
     $page = 0;
-    window.location.href = `${ORIGIN_URL}/admin/modules/browse`;
+    window.location.href = Drupal.url('admin/modules/browse');
   }
 
   onMount(() => {
@@ -28,7 +27,7 @@
   });
 </script>
 
-<a class="action-link" href="{ORIGIN_URL}/admin/modules/browse">
+<a class="action-link" href={Drupal.url('admin/modules/browse')}>
   <span aria-hidden="true">&#9001&#xA0</span>
   {Drupal.t('Back to Browsing')}
 </a>
diff --git a/sveltejs/src/Project/ActionButton.svelte b/sveltejs/src/Project/ActionButton.svelte
index 9c509911543baba74ba4850a76ce4f5c801dc212..963f314c0cb4f5b86fd7d03e55191f5251e645a4 100644
--- a/sveltejs/src/Project/ActionButton.svelte
+++ b/sveltejs/src/Project/ActionButton.svelte
@@ -1,6 +1,6 @@
 <script>
   import { onMount } from 'svelte';
-  import { ORIGIN_URL, PACKAGE_MANAGER } from '../constants';
+  import { PACKAGE_MANAGER } from '../constants';
   import Loading from '../Loading.svelte';
   import { openPopup, getCommandsPopupMessage } from '../popup';
   import AddInstallButton from './AddInstallButton.svelte';
@@ -32,7 +32,9 @@
    *   Return is not used, but is a promise due to this being async.
    */
   const showStatus = async (initiate = false) => {
-    const url = `${ORIGIN_URL}/admin/modules/project_browser/install_in_progress/${project.id}`;
+    const url = Drupal.url(
+      `admin/modules/project_browser/install_in_progress/${project.id}`,
+    );
 
     //
     /**
diff --git a/sveltejs/src/Project/AddInstallButton.svelte b/sveltejs/src/Project/AddInstallButton.svelte
index c3b445d4c9cf63859ada11a5772ce54139eb7e56..c5ab0edf1af9d20485a9f1d2ea0616d6502b047d 100644
--- a/sveltejs/src/Project/AddInstallButton.svelte
+++ b/sveltejs/src/Project/AddInstallButton.svelte
@@ -1,6 +1,6 @@
 <script>
   import { openPopup } from '../popup';
-  import { ORIGIN_URL, PACKAGE_MANAGER } from '../constants';
+  import { PACKAGE_MANAGER } from '../constants';
   import ProjectButtonBase from './ProjectButtonBase.svelte';
 
   export let project;
@@ -59,7 +59,9 @@
    */
   async function activateProject() {
     loading = true;
-    const url = `${ORIGIN_URL}/admin/modules/project_browser/activate/${project.id}`;
+    const url = Drupal.url(
+      `admin/modules/project_browser/activate/${project.id}`,
+    );
     const installResponse = await fetch(url);
     if (!installResponse.ok) {
       handleError(installResponse);
@@ -97,7 +99,9 @@
      */
     async function doRequests() {
       loading = true;
-      const beginInstallUrl = `${ORIGIN_URL}/admin/modules/project_browser/install-begin/${project.id}`;
+      const beginInstallUrl = Drupal.url(
+        `admin/modules/project_browser/install-begin/${project.id}`,
+      );
       const beginInstallResponse = await fetch(beginInstallUrl);
       if (!beginInstallResponse.ok) {
         await handleError(beginInstallResponse);
@@ -108,10 +112,12 @@
         // with their own endpoint. When one stage completes, the next one is
         // requested.
         const installSteps = [
-          `${ORIGIN_URL}/admin/modules/project_browser/install-require/${project.id}`,
-          `${ORIGIN_URL}/admin/modules/project_browser/install-apply`,
-          `${ORIGIN_URL}/admin/modules/project_browser/install-post_apply`,
-          `${ORIGIN_URL}/admin/modules/project_browser/install-destroy`,
+          Drupal.url(
+            `admin/modules/project_browser/install-require/${project.id}`,
+          ),
+          Drupal.url('admin/modules/project_browser/install-apply'),
+          Drupal.url('admin/modules/project_browser/install-post_apply'),
+          Drupal.url('admin/modules/project_browser/install-destroy'),
         ];
 
         // eslint-disable-next-line no-restricted-syntax,guard-for-in
diff --git a/sveltejs/src/Project/Project.svelte b/sveltejs/src/Project/Project.svelte
index bc0fd76b5b78b5b65b92751c90424cdee9ffcad0..79370b57450bb7dc2bd99f6ec2175eb6d6e12db4 100644
--- a/sveltejs/src/Project/Project.svelte
+++ b/sveltejs/src/Project/Project.svelte
@@ -7,7 +7,7 @@
   import Categories from './Categories.svelte';
   import ProjectIcon from './ProjectIcon.svelte';
   import { focusedElement, mediaQueryValues } from '../stores';
-  import { FULL_MODULE_PATH, ORIGIN_URL } from '../constants';
+  import { FULL_MODULE_PATH } from '../constants';
 
   const { Drupal } = window;
 
@@ -33,7 +33,7 @@
       <a
         id="{project.project_machine_name}_title"
         class="pb-project__link"
-        href="{ORIGIN_URL}/admin/modules/browse/{project.id}"
+        href={Drupal.url(`admin/modules/browse/${project.id}`)}
         rel="noreferrer">{project.title}</a
       >
     </h3>
diff --git a/sveltejs/src/ProjectBrowser.svelte b/sveltejs/src/ProjectBrowser.svelte
index fd78621170728471866b81bf0e221bb39317535b..ed881acb0730070eeb003a24eb89b017bca24712 100644
--- a/sveltejs/src/ProjectBrowser.svelte
+++ b/sveltejs/src/ProjectBrowser.svelte
@@ -28,7 +28,6 @@
     ALL_VALUES_ID,
     DEFAULT_SOURCE_ID,
     CURRENT_SOURCES_KEYS,
-    ORIGIN_URL,
     FULL_MODULE_PATH,
     SORT_OPTIONS,
     ACTIVE_PLUGINS,
@@ -103,7 +102,10 @@
         JSON.stringify($categoryCheckedTrack),
       );
     }
-    const url = `${ORIGIN_URL}/drupal-org-proxy/project?${searchParams.toString()}`;
+
+    const url = Drupal.url(
+      `drupal-org-proxy/project?${searchParams.toString()}`,
+    );
 
     const res = await fetch(url);
     if (res.ok) {
diff --git a/sveltejs/src/constants.js b/sveltejs/src/constants.js
index 67326af8d3cd0994c2e84b4074b089f65a1a2e88..f2aace5f4b59e06c780ba00bef8292f43a06b3fc 100644
--- a/sveltejs/src/constants.js
+++ b/sveltejs/src/constants.js
@@ -14,8 +14,7 @@ export const DEFAULT_SOURCE_ID =
   drupalSettings.project_browser.default_plugin_id;
 export const CURRENT_SOURCES_KEYS =
   drupalSettings.project_browser.current_sources_keys;
-export const ORIGIN_URL = drupalSettings.project_browser.origin_url;
-export const FULL_MODULE_PATH = `${ORIGIN_URL}/${drupalSettings.project_browser.module_path}`;
+export const FULL_MODULE_PATH = Drupal.url(drupalSettings.project_browser.module_path);
 export const DARK_COLOR_SCHEME =
   matchMedia('(forced-colors: active)').matches &&
   matchMedia('(prefers-color-scheme: dark)').matches;