diff --git a/packages/server/lib/browsers/firefox-util.ts b/packages/server/lib/browsers/firefox-util.ts
index 3f83d990965e..158981fbda0d 100644
--- a/packages/server/lib/browsers/firefox-util.ts
+++ b/packages/server/lib/browsers/firefox-util.ts
@@ -57,21 +57,20 @@ async function navigateToUrlClassic (url: string) {
 export default {
   async setup ({
     automation,
+    onError,
     url,
-    foxdriverPort,
     remotePort,
     webdriverClient: wdInstance,
   }: {
     automation: Automation
+    onError?: (err: Error) => void
     url: string
-    foxdriverPort: number
     remotePort: number
     webdriverClient: WebDriverClient
   }): Promise<BrowserCriClient> {
     // set the WebDriver classic instance instantiated from geckodriver
     webdriverClient = wdInstance
-    const [, browserCriClient] = await Promise.all([
-      this.setupFoxdriver(foxdriverPort),
+    const [browserCriClient] = await Promise.all([
       setupCDP(remotePort, automation, onError),
     ])
 
diff --git a/packages/server/lib/browsers/firefox.ts b/packages/server/lib/browsers/firefox.ts
index 2b4793681b8b..48d53f6c450c 100644
--- a/packages/server/lib/browsers/firefox.ts
+++ b/packages/server/lib/browsers/firefox.ts
@@ -449,13 +449,13 @@ export async function open (browser: Browser, url: string, options: BrowserLaunc
   const [
     marionettePort,
     webDriverBiDiPort,
-  ] = await Promise.all([getPort(), getPort(), getPort()])
+  ] = await Promise.all([getPort(), getPort()])
 
   defaultLaunchOptions.preferences['marionette.port'] = marionettePort
 
   // NOTE: we get the BiDi port and set it inside of geckodriver, but BiDi is not currently enabled (see remote.active-protocols above).
   // this is so the BiDi websocket port does not get set to 0, which is the default for the geckodriver package.
-  debug('available ports: %o', { foxdriverPort, marionettePort, webDriverBiDiPort })
+  debug('available ports: %o', { marionettePort, webDriverBiDiPort })
 
   const profileDir = utils.getProfileDir(browser, options.isTextTerminal)
 
@@ -686,7 +686,7 @@ export async function open (browser: Browser, url: string, options: BrowserLaunc
     }))
 
     debug('setting up firefox utils')
-    browserCriClient = await firefoxUtil.setup({ automation, url, foxdriverPort, webdriverClient, remotePort: cdpPort, onError: options.onError })
+    browserCriClient = await firefoxUtil.setup({ automation, url, webdriverClient, remotePort: cdpPort, onError: options.onError })
 
     await utils.executeAfterBrowserLaunch(browser, {
       webSocketDebuggerUrl: browserCriClient.getWebSocketDebuggerUrl(),