diff --git a/lib/extensionserver/index.js b/lib/extensionserver/index.js
index 13e55444c..df7294691 100644
--- a/lib/extensionserver/index.js
+++ b/lib/extensionserver/index.js
@@ -18,7 +18,6 @@ export class ExtensionServer {
       (options.cacheClearRaw ||
         options.requestheader ||
         options.block ||
-        options.basicAuth ||
         options.cookie ||
         options.clearCacheKeepCookies)
       ? true
diff --git a/lib/firefox/firefoxBidi.js b/lib/firefox/firefoxBidi.js
index 64b80ebff..1aa2a725d 100644
--- a/lib/firefox/firefoxBidi.js
+++ b/lib/firefox/firefoxBidi.js
@@ -1,10 +1,12 @@
+import { Bidi } from '../core/engine/command/bidi.js';
 import intel from 'intel';
 const log = intel.getLogger('browsertime.firefox.bidi');
 
 export class FirefoxBidi {
-  constructor(bidi, browsingContextId, options) {
+  constructor(bidi, browsingContextId, driver, options) {
     this.options = options;
     this.bidi = bidi;
+    this.driver = driver;
     this.browsingContextId = browsingContextId;
   }
 
@@ -22,4 +24,38 @@ export class FirefoxBidi {
       log.error('Could not inject JavaScript:' + error);
     }
   }
+
+  async setBasicAuth(basicAuth) {
+    const parts = basicAuth.split('@');
+    const bidi = new Bidi(this.driver, this.options.browser);
+
+    const command = {
+      method: 'network.addIntercept',
+      params: {
+        phases: ['authRequired']
+      }
+    };
+    await bidi.send(command);
+
+    await bidi.subscribe('network.authRequired');
+
+    await bidi.onMessage(async function (event) {
+      const parsedEvent = JSON.parse(Buffer.from(event.toString()));
+      if (parsedEvent.method === 'network.authRequired') {
+        const continueWithAuth = {
+          method: 'network.continueWithAuth',
+          params: {
+            request: parsedEvent.params.request.request,
+            action: 'provideCredentials',
+            credentials: {
+              type: 'password',
+              username: parts[0],
+              password: parts[1]
+            }
+          }
+        };
+        await bidi.send(continueWithAuth);
+      }
+    });
+  }
 }
diff --git a/lib/firefox/webdriver/firefox.js b/lib/firefox/webdriver/firefox.js
index e7272278f..f906ed600 100644
--- a/lib/firefox/webdriver/firefox.js
+++ b/lib/firefox/webdriver/firefox.js
@@ -67,6 +67,7 @@ export class Firefox {
     this.bidi = new FirefoxBidi(
       await runner.getDriver().getBidi(),
       this.windowId,
+      runner.getDriver(),
       this.options
     );
   }
@@ -90,6 +91,10 @@ export class Firefox {
       await this.bidi.injectJavaScript(this.options.injectJs);
     }
 
+    if (this.options.basicAuth) {
+      await this.bidi.setBasicAuth(this.options.basicAuth);
+    }
+
     if (
       this.firefoxConfig.appendToUserAgent ||
       this.options.appendToUserAgent