diff --git a/extensions/browser/src/browser/errors.ts b/extensions/browser/src/browser/errors.ts
index acc052d5139..ee0544a2d45 100644
--- a/extensions/browser/src/browser/errors.ts
+++ b/extensions/browser/src/browser/errors.ts
@@ -29,12 +29,6 @@ export class BrowserValidationError extends BrowserError {
   }
 }
 
-export class BrowserConfigurationError extends BrowserError {
-  constructor(message: string, options?: ErrorOptions) {
-    super(message, 400, options);
-  }
-}
-
 export class BrowserTargetAmbiguousError extends BrowserError {
   constructor(message = "ambiguous target id prefix", options?: ErrorOptions) {
     super(message, 409, options);
diff --git a/extensions/browser/src/browser/server-context.remote-tab-ops.harness.ts b/extensions/browser/src/browser/server-context.remote-tab-ops.harness.ts
index f92a7542a84..b4caea84348 100644
--- a/extensions/browser/src/browser/server-context.remote-tab-ops.harness.ts
+++ b/extensions/browser/src/browser/server-context.remote-tab-ops.harness.ts
@@ -55,7 +55,7 @@ export function makeState(
   };
 }
 
-export function makeUnexpectedFetchMock() {
+function makeUnexpectedFetchMock() {
   return vi.fn(async () => {
     throw new Error("unexpected fetch");
   });