diff --git a/src/i18n.js b/src/i18n.js
index 07d6208..25f6565 100644
--- a/src/i18n.js
+++ b/src/i18n.js
@@ -27,14 +27,19 @@ export const i18n = createI18n({
             "errors.theme.invalid": "The theme is invalid.",
             "errors.unknown":
                 "An unknown error has occurred. Please close and reopen the extension. If it still doesn’t work, please contact the support.",
+            "errors.url.presence": "Enter a URL.",
             "errors.url.url": "The URL of the current page is not supported by Flus.",
             "feeds.count_detected":
                 "No feeds detected on this page. | 1 feed detected on this page. | {count} feeds detected on this page.",
             "feeds.follow": "Follow",
             "feeds.loading": "Loading the feeds…",
             "feeds.open_in_flus": "Open in Flus",
+            "feeds.search_tip":
+                "Tip: search for mentions of the word “RSS” on the page. If there are any, copy and paste the corresponding URL below.",
+            "feeds.test": "Test",
             "feeds.title": "List of Web feeds",
             "feeds.unfollow": "Unfollow",
+            "feeds.url_potential_feed": "URL of a potential feed",
             "forms.error": "Error:",
             "link.count_collections": "No collections | 1 collection | {count} collections",
             "link.invalid_protocol":
@@ -105,14 +110,19 @@ export const i18n = createI18n({
             "errors.theme.invalid": "Le thème est invalide.",
             "errors.unknown":
                 "Une erreur inconnue est survenue. Veuillez fermer et réouvrir l’extension. Si cela ne suffit pas, veuillez contacter le support.",
+            "errors.url.presence": "Saisissez une URL.",
             "errors.url.url": "L’URL de la page actuelle n’est pas supportée par Flus.",
             "feeds.count_detected":
                 "Aucun flux détecté sur cette page. | 1 flux détecté sur cette page. | {count} flux détectés sur cette page.",
             "feeds.follow": "Suivre",
             "feeds.loading": "Chargement des flux…",
             "feeds.open_in_flus": "Ouvrir dans Flus",
+            "feeds.search_tip":
+                "Astuce : recherchez des mentions du mot « RSS » dans la page. S’il en existe, copiez-collez l’URL correspondante ci-dessous.",
+            "feeds.test": "Tester",
             "feeds.title": "Liste des flux Web",
             "feeds.unfollow": "Ne plus suivre",
+            "feeds.url_potential_feed": "URL d’un flux potentiel",
             "forms.error": "Erreur :",
             "link.count_collections": "Aucune collection | 1 collection | {count} collections",
             "link.invalid_protocol":
diff --git a/src/screens/FeedsScreen.vue b/src/screens/FeedsScreen.vue
index 0c0e2af..c10bbcc 100644
--- a/src/screens/FeedsScreen.vue
+++ b/src/screens/FeedsScreen.vue
@@ -4,7 +4,7 @@
 
 <template>
     <Screen :title="title" header>
-        <div v-if="ready && alert.type === ''" class="flow">
+        <div v-if="ready && alert.type === ''" class="flow flow--large">
             <p class="text--center">
                 {{ t("feeds.count_detected", feeds.length) }}
             </p>
@@ -44,6 +44,46 @@
                     </div>
                 </li>
             </ul>
+
+            <div v-else class="flow">
+                <p>
+                    {{ t("feeds.search_tip") }}
+                </p>
+
+                <form
+                    @submit.prevent="testUrl"
+                    class="flow flow--small"
+                    :disabled="form.inProgress()"
+                >
+                    <div class="flow flow--smaller">
+                        <label for="url">
+                            {{ t('feeds.url_potential_feed') }}
+                        </label>
+
+                        <p v-if="form.isInvalid('url')" id="url-error" class="form-group__error" role="alert">
+                            {{ t('forms.error') }}
+                            {{ form.error('url') }}
+                        </p>
+
+                        <input
+                            v-model="urlToTest"
+                            type="url"
+                            id="url"
+                            placeholder="https://…"
+                            required
+                            :aria-invalid="form.isInvalid('url')"
+                            :aria-errormessage="form.isInvalid('url') ? 'url-error' : null"
+                            :disabled="form.inProgress()"
+                        />
+                    </div>
+
+                    <div class="text--center">
+                        <button class="button--primary button--big" :disabled="form.inProgress()">
+                            {{ t('feeds.test') }}
+                        </button>
+                    </div>
+                </form>
+            </div>
         </div>
 
         <div v-else-if="ready && alert.type == 'info'">
@@ -81,6 +121,7 @@ import browser from "webextension-polyfill";
 import { store } from "../store.js";
 import api from "../api.js";
 import http from "../http.js";
+import form from "../form.js";
 import Feed from "../models/feed.js";
 
 const { t, locale } = useI18n();
@@ -96,6 +137,8 @@ const alert = ref({
 
 const feeds = ref([]);
 
+const urlToTest = ref("");
+
 function feedUrl(feed) {
     return `${store.auth.server}/collections/${feed.id}`;
 }
@@ -111,20 +154,7 @@ async function getCurrentTab() {
         });
 }
 
-async function refreshForCurrentTab() {
-    const url = (await getCurrentTab()).url;
-
-    if (!url.startsWith("http://") && !url.startsWith("https://")) {
-        alert.value = {
-            type: "info",
-            message: t("link.invalid_protocol"),
-        };
-
-        ready.value = true;
-
-        return;
-    }
-
+function refreshForUrl(url) {
     api.search(url)
         .then((data) => {
             // This array is used to deduplicate feeds with the same name.
@@ -144,12 +174,7 @@ async function refreshForCurrentTab() {
         })
         .catch((error) => {
             if (error instanceof http.HttpError) {
-                alert.value = {
-                    type: "error",
-                    message: error.errors.url.map((error) => {
-                        return t(`errors.url.${error.code}`);
-                    }),
-                };
+                form.setAndFormatErrors(error.errors, t);
             } else {
                 alert.value = {
                     type: "error",
@@ -161,6 +186,23 @@ async function refreshForCurrentTab() {
         });
 }
 
+async function refreshForCurrentTab() {
+    const url = (await getCurrentTab()).url;
+
+    if (!url.startsWith("http://") && !url.startsWith("https://")) {
+        alert.value = {
+            type: "info",
+            message: t("link.invalid_protocol"),
+        };
+
+        ready.value = true;
+
+        return;
+    }
+
+    refreshForUrl(url);
+}
+
 async function follow(feed) {
     api.follow(feed)
         .then(() => {
@@ -187,5 +229,9 @@ async function unfollow(feed) {
         });
 }
 
+function testUrl() {
+    refreshForUrl(urlToTest.value);
+}
+
 onMounted(refreshForCurrentTab);
 </script>