diff --git a/docs/assets/init-demo.gif b/docs/assets/init-demo.gif
index 353c8b73..03dc2acf 100644
Binary files a/docs/assets/init-demo.gif and b/docs/assets/init-demo.gif differ
diff --git a/packages/wxt/e2e/tests/user-config.test.ts b/packages/wxt/e2e/tests/user-config.test.ts
index c0b49750..b120bf87 100644
--- a/packages/wxt/e2e/tests/user-config.test.ts
+++ b/packages/wxt/e2e/tests/user-config.test.ts
@@ -157,4 +157,18 @@ describe('User Config', () => {
       await project.fileExists('.output/test-chrome-mv3-development-dev-build'),
     ).toBe(true);
   });
+
+  it('should throw error when config file not exist', async () => {
+    const project = new TestProject();
+    project.addFile(
+      'src/entrypoints/background.ts',
+      `export default defineBackground(
+        () => console.log('Hello background'),
+      );`,
+    );
+
+    await expect(
+      project.build({ configFile: 'foo.config.ts' }),
+    ).rejects.toThrowError(/not found/);
+  });
 });
diff --git a/packages/wxt/src/core/resolve-config.ts b/packages/wxt/src/core/resolve-config.ts
index dc93a319..cb6f40cb 100644
--- a/packages/wxt/src/core/resolve-config.ts
+++ b/packages/wxt/src/core/resolve-config.ts
@@ -53,6 +53,9 @@ export async function resolveConfig(
         esmResolve: true,
       },
     });
+    if (inlineConfig.configFile && metadata.layers?.length === 0) {
+      throw Error(`Config file "${inlineConfig.configFile}" not found`);
+    }
     userConfig = loadedConfig ?? {};
     userConfigMetadata = metadata;
   }