diff --git a/package-lock.json b/package-lock.json
index d37a5121..c05eeaea 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@brightspace-ui/testing",
-  "version": "0.10.0",
+  "version": "0.11.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "@brightspace-ui/testing",
-      "version": "0.10.0",
+      "version": "0.11.0",
       "license": "Apache-2.0",
       "dependencies": {
         "@open-wc/testing": "^3",
@@ -2659,9 +2659,9 @@
       "integrity": "sha512-WMwm9LhRUo+WUaRN+vRuETqG89IgZphVSNkdFgeb6sS/E4OrDIN7t48CAewSHXc6C8lefD8KKfr5vY61brQlow=="
     },
     "node_modules/electron-to-chromium": {
-      "version": "1.4.435",
-      "resolved": "https://registry.npmjs.org/electron-to-chromium/-/electron-to-chromium-1.4.435.tgz",
-      "integrity": "sha512-B0CBWVFhvoQCW/XtjRzgrmqcgVWg6RXOEM/dK59+wFV93BFGR6AeNKc4OyhM+T3IhJaOOG8o/V+33Y2mwJWtzw==",
+      "version": "1.4.437",
+      "resolved": "https://registry.npmjs.org/electron-to-chromium/-/electron-to-chromium-1.4.437.tgz",
+      "integrity": "sha512-ZFekRuBOHUXp21wrR5lshT6pZa/KmjkhKBAtmZz4NN5sCWlHOk3kdhiwFINrDBsRLX6FjyBAb1TRN+KBeNlyzQ==",
       "dev": true,
       "peer": true
     },
@@ -3642,9 +3642,9 @@
       }
     },
     "node_modules/glob": {
-      "version": "10.2.7",
-      "resolved": "https://registry.npmjs.org/glob/-/glob-10.2.7.tgz",
-      "integrity": "sha512-jTKehsravOJo8IJxUGfZILnkvVJM/MOfHRs8QcXolVef2zNI9Tqyy5+SeuOAZd3upViEZQLyFpQhYiHLrMUNmA==",
+      "version": "10.3.0",
+      "resolved": "https://registry.npmjs.org/glob/-/glob-10.3.0.tgz",
+      "integrity": "sha512-AQ1/SB9HH0yCx1jXAT4vmCbTOPe5RQ+kCurjbel5xSCGhebumUv+GJZfa1rEqor3XIViqwSEmlkZCQD43RWrBg==",
       "dependencies": {
         "foreground-child": "^3.1.0",
         "jackspeak": "^2.0.3",
diff --git a/package.json b/package.json
index 24e141c1..aa9c19ad 100644
--- a/package.json
+++ b/package.json
@@ -2,7 +2,7 @@
   "name": "@brightspace-ui/testing",
   "description": "Utilities for testing front-end components and applications",
   "type": "module",
-  "version": "0.10.0",
+  "version": "0.11.0",
   "repository": "https://github.com/BrightspaceUI/testing.git",
   "scripts": {
     "lint": "eslint . --ext .js",
diff --git a/src/browser/commands.js b/src/browser/commands.js
index c54aaa8f..3e65c4ba 100644
--- a/src/browser/commands.js
+++ b/src/browser/commands.js
@@ -37,7 +37,7 @@ export async function sendKeys(action, keys) {
 	await cmdSendKeys(val);
 }
 
-export async function sendKeysElem(action, keys, elem) {
+export async function sendKeysElem(elem, action, keys) {
 	if (elem) {
 		await focusElem(elem);
 	}
diff --git a/src/server/headed-mode-plugin.js b/src/server/headed-mode-plugin.js
index 3479fe9f..cc4c757d 100644
--- a/src/server/headed-mode-plugin.js
+++ b/src/server/headed-mode-plugin.js
@@ -2,7 +2,7 @@ import { globSync } from 'glob';
 
 export function headedMode({ manual, watch, pattern }) {
 
-	const files = globSync(pattern, { ignore: 'node_modules/**' });
+	const files = globSync(pattern, { ignore: 'node_modules/**', posix: true });
 
 	return {
 		name: 'brightspace-headed-mode',
diff --git a/src/server/wtr-config.js b/src/server/wtr-config.js
index bba1362a..dd21b77d 100644
--- a/src/server/wtr-config.js
+++ b/src/server/wtr-config.js
@@ -13,10 +13,10 @@ const optionDefinitions = [
 	{ name: 'watch', type: Boolean },
 	// custom options
 	{ name: 'chromium', type: Boolean },
+	{ name: 'filter', alias: 'f', type: String, multiple: true },
 	{ name: 'firefox', type: Boolean },
 	{ name: 'golden', type: Boolean },
 	{ name: 'grep', alias: 'g', type: String },
-	{ name: 'filter', alias: 'f', type: String, multiple: true },
 	{ name: 'timeout', type: Number },
 	{ name: 'webkit', type: Boolean },
 ];
@@ -213,6 +213,7 @@ export class WTRConfig {
 		if (!Array.isArray(browsers)) throw new TypeError('browsers must be an array');
 
 		return browsers.map((b) => playwrightLauncher({
+			concurrency: b === 'firefox' ? 1 : undefined, // focus in Firefox unreliable if concurrency > 1 (https://github.com/modernweb-dev/web/issues/238)
 			product: b,
 			createBrowserContext: ({ browser }) => browser.newContext({ deviceScaleFactor: 2, reducedMotion: 'reduce' })
 		}));
diff --git a/test/browser/commands.test.js b/test/browser/commands.test.js
index 104321dd..7a3708a2 100644
--- a/test/browser/commands.test.js
+++ b/test/browser/commands.test.js
@@ -58,7 +58,7 @@ describe('commands', () => {
 	});
 
 	it('should send keys to element', async() => {
-		await sendKeysElem('type', 'Hello', elem);
+		await sendKeysElem(elem, 'type', 'Hello');
 		expect(elem.value).to.equal('Hello');
 	});