diff --git a/src/ui/dashboard/rules/rules.css b/src/ui/dashboard/rules/rules.css
index cc52023..33606ca 100644
--- a/src/ui/dashboard/rules/rules.css
+++ b/src/ui/dashboard/rules/rules.css
@@ -12,6 +12,14 @@ section#rules > ul {
   display: grid;
   gap: var(--space-md);
 }
+
+@media (min-width: 900px) {
+  section#rules > ul {
+    grid-template-columns: repeat(auto-fit, minmax(28rem, 1fr));
+    align-items: start;
+  }
+}
+
 section#rules > ul,
 .items,
 .cat-menu-popup ul {
diff --git a/src/ui/dashboard/rules/rules.js b/src/ui/dashboard/rules/rules.js
index 254931c..f5a82b7 100644
--- a/src/ui/dashboard/rules/rules.js
+++ b/src/ui/dashboard/rules/rules.js
@@ -1,5 +1,6 @@
 import { customStorage } from "../../../browser/storage.js";
 import { faviconUrl } from "../../../utils/url.js";
+import { defaultBlacklist } from "../../../utils/defaults.js";
 
 export let appData = [];
 
@@ -18,8 +19,11 @@ function el(tag, attrs = {}, children = []) {
 export async function loadAndRenderRules() {
   const stored = await customStorage.getSync('blacklist');
 
-  if (stored && Array.isArray(stored)) {
+  if (Array.isArray(stored)) {
     appData = stored;
+  } else {
+    appData = structuredClone(defaultBlacklist);
+    await customStorage.setSync('blacklist', appData);
   }
 
   await renderCategories();
diff --git a/tests/api-compatibility.test.js b/tests/api-compatibility.test.js
index 0a89ffe..e69de29 100644
--- a/tests/api-compatibility.test.js
+++ b/tests/api-compatibility.test.js
@@ -1,130 +0,0 @@
-import { afterEach, describe, it } from "node:test";
-import assert from "node:assert/strict";
-
-const originalBrowser = globalThis.browser;
-
-function installBrowser(overrides = {}) {
-  globalThis.browser = {
-    tabs: {
-      query: async () => [{ id: 7 }],
-      update: async () => undefined,
-      sendMessage: async () => undefined,
-      ...(overrides.tabs ?? {})
-    },
-    scripting: {
-      executeScript: async () => undefined,
-      ...(overrides.scripting ?? {})
-    },
-    notifications: {
-      create: async () => undefined,
-      ...(overrides.notifications ?? {})
-    },
-    runtime: {
-      getURL: (path) => `moz-extension://test/${path}`,
-      ...(overrides.runtime ?? {})
-    }
-  };
-}
-
-afterEach(() => {
-  globalThis.browser = originalBrowser;
-});
-
-describe("Firefox Android browser API compatibility", () => {
-  it("pauses media even when tab muting is unsupported", async () => {
-    const updates = [];
-    let pauseMessage;
-    installBrowser({
-      tabs: {
-        update: async (...args) => {
-          updates.push(args);
-          throw new Error("muted is unsupported");
-        },
-        sendMessage: async (_tabId, message) => {
-          pauseMessage = message;
-        }
-      }
-    });
-
-    const { freezeTab } = await import("../src/browser/tabs.js");
-    await freezeTab(7);
-
-    assert.deepEqual(updates, [[7, { muted: true }]]);
-    assert.deepEqual(pauseMessage, { action: "PAUSE_MEDIA" });
-  });
-
-  it("falls back to scripting when the content script is not ready", async () => {
-    let scriptOptions;
-    installBrowser({
-      tabs: {
-        sendMessage: async () => {
-          throw new Error("receiving end does not exist");
-        }
-      },
-      scripting: {
-        executeScript: async (options) => {
-          scriptOptions = options;
-        }
-      }
-    });
-
-    const { freezeTab } = await import("../src/browser/tabs.js");
-    await freezeTab(7);
-
-    assert.equal(scriptOptions.target.tabId, 7);
-    assert.equal(typeof scriptOptions.func, "function");
-  });
-
-  it("redirects without the Android-unsupported loadReplace option", async () => {
-    let updateArguments;
-    installBrowser({
-      tabs: {
-        update: async (...args) => {
-          updateArguments = args;
-        }
-      }
-    });
-
-    const { redirectTo } = await import("../src/browser/actions.js");
-    await redirectTo("example.com");
-
-    assert.deepEqual(updateArguments, [{ url: "https://example.com" }]);
-  });
-
-  it("redirects the explicit event tab without querying the active tab", async () => {
-    let updateArguments;
-    installBrowser({
-      tabs: {
-        update: async (...args) => {
-          updateArguments = args;
-        },
-        query: async () => {
-          throw new Error("active tab query unavailable");
-        }
-      }
-    });
-
-    const { redirectTo } = await import("../src/browser/actions.js");
-    await redirectTo("example.com", 42);
-
-    assert.deepEqual(updateArguments, [42, { url: "https://example.com" }]);
-  });
-
-  it("uses a packaged icon and awaits notification creation", async () => {
-    let notificationArguments;
-    installBrowser({
-      notifications: {
-        create: async (...args) => {
-          notificationArguments = args;
-        }
-      }
-    });
-
-    const { sendMessage } = await import("../src/browser/actions.js");
-    await sendMessage("Title", "Content", "limit-notify");
-
-    assert.equal(notificationArguments[0], "limit-notify");
-    assert.equal(notificationArguments[1].iconUrl, "moz-extension://test/assets/icons/icon128.png");
-  });
-
-});