diff --git a/extensions/browser/src/browser/cdp.helpers.fuzz.test.ts b/extensions/browser/src/browser/cdp.helpers.fuzz.test.ts
index 94236a67756..dcd687fe819 100644
--- a/extensions/browser/src/browser/cdp.helpers.fuzz.test.ts
+++ b/extensions/browser/src/browser/cdp.helpers.fuzz.test.ts
@@ -200,7 +200,7 @@ describe("fuzz: isDirectCdpWebSocketEndpoint", () => {
     }
   });
 
-  it("never throws on random input (including invalid URLs)", () => {
+  it("returns booleans for random input including invalid URLs", () => {
     const rng = makeRng(0x2004);
     const junkPool = [
       "",
@@ -215,7 +215,6 @@ describe("fuzz: isDirectCdpWebSocketEndpoint", () => {
     ];
     for (let i = 0; i < ITERATIONS; i += 1) {
       const input = rng() < 0.5 ? pick(rng, junkPool) : String.fromCharCode(randInt(rng, 0, 0x7f));
-      expect(() => isDirectCdpWebSocketEndpoint(input)).not.toThrow();
       expect(typeof isDirectCdpWebSocketEndpoint(input)).toBe("boolean");
     }
   });
@@ -271,12 +270,12 @@ describe("fuzz: normalizeCdpHttpBaseForJsonEndpoints", () => {
     }
   });
 
-  it("falls back safely for non-URL-ish inputs (never throws)", () => {
+  it("returns normalized strings for non-URL-ish inputs", () => {
     const rng = makeRng(0x3003);
     // These inputs either trigger the catch branch (empty / "garbage" /
     // bare "ws://" / "wss://") or are accepted by WHATWG URL as
     // special-scheme absolute URLs (e.g. "ws:host/path" becomes
-    // "ws://host/path"). Either way the helper must never throw.
+    // "ws://host/path"). Both paths must return strings.
     const junk = [
       "ws:/devtools/browser/abc",
       "wss:/devtools/browser/abc",
@@ -289,7 +288,6 @@ describe("fuzz: normalizeCdpHttpBaseForJsonEndpoints", () => {
     ];
     for (let i = 0; i < ITERATIONS; i += 1) {
       const input = pick(rng, junk);
-      expect(() => normalizeCdpHttpBaseForJsonEndpoints(input)).not.toThrow();
       const out = normalizeCdpHttpBaseForJsonEndpoints(input);
       expect(typeof out).toBe("string");
       // Scheme swap invariant: whatever branch ran, ws:/wss: never
@@ -377,11 +375,10 @@ describe("fuzz: redactCdpUrl", () => {
     expect(redactCdpUrl("   ")).toBe("");
   });
 
-  it("falls back to redactSensitiveText for non-URL-ish inputs (never throws)", () => {
+  it("falls back to redactSensitiveText for non-URL-ish inputs", () => {
     const rng = makeRng(0x5002);
     for (let i = 0; i < ITERATIONS; i += 1) {
       const junk = pick(rng, ["not-a-url", "http://", "ws://", "::::", "Bearer ey.SECRET.xyz"]);
-      expect(() => redactCdpUrl(junk)).not.toThrow();
       const out = redactCdpUrl(junk);
       expect(typeof out).toBe("string");
     }
@@ -405,7 +402,7 @@ describe("fuzz: appendCdpPath", () => {
 });
 
 describe("fuzz: getHeadersWithAuth", () => {
-  it("never throws and always returns a mergedHeaders object", () => {
+  it("always returns a mergedHeaders object", () => {
     const rng = makeRng(0x7001);
     for (let i = 0; i < ITERATIONS; i += 1) {
       const withAuth = rng() < 0.3;