diff --git a/packages/ai/CHANGELOG.md b/packages/ai/CHANGELOG.md
index 390725885..6698e81f6 100644
--- a/packages/ai/CHANGELOG.md
+++ b/packages/ai/CHANGELOG.md
@@ -17,6 +17,7 @@
 - Fixed OpenAI Codex WebSocket continuations to treat proxy stale-anchor codes such as `codex_previous_response_stale` as an expired `previous_response_id` chain — same recovery class as the OpenAI-standard `previous_response_not_found` — so the turn is retried with full context instead of surfacing the error to the user ([#4624](https://github.com/can1357/oh-my-pi/issues/4624)).
 - Fixed Azure Foundry Anthropic utility requests to omit the structured-output beta whenever strict tools are disabled, preventing `structured_outputs not supported in your workspace` failures for Sonnet 5 compaction ([#4679](https://github.com/can1357/oh-my-pi/issues/4679)).
 - Fixed OAuth `launchUrl` advertisement for flows whose redirect never returns to the local callback server: custom-scheme redirects (e.g. GitLab Duo's `vscode://` URI, which `new URL` parses without complaint) and fixed non-loopback hosts no longer receive a `http://localhost:<port>/launch` copy target that misrepresents the callback endpoint and resolves nowhere for remote users.
+- Fixed the OAuth completion page copy to tell users they can close the tab manually when browsers such as Firefox ignore best-effort `window.close()` calls. ([#4855](https://github.com/can1357/oh-my-pi/issues/4855))
 ### Fixed
 
 - Codex load balancing: clear stale persisted and in-memory usage-limit blocks for an `openai-codex` account when a fresh live usage report shows it is allowed and below all limits, including broker-backed gateway snapshots, so traffic returns to recovered accounts instead of funneling to one sibling.
diff --git a/packages/ai/src/registry/oauth/oauth.html b/packages/ai/src/registry/oauth/oauth.html
index 0730c4514..08f54bfd2 100644
--- a/packages/ai/src/registry/oauth/oauth.html
+++ b/packages/ai/src/registry/oauth/oauth.html
@@ -305,7 +305,7 @@
 			if (serverState.ok) {
 				app.classList.add("success", "countdown");
 				title.textContent = "Authentication Successful";
-				message.innerHTML = "You have successfully logged in.<br>This window will close automatically.";
+				message.innerHTML = "You have successfully logged in.<br>You can now close this tab.";
 				setTimeout(() => window.close(), 3000);
 			} else {
 				app.classList.add("error");
diff --git a/packages/ai/test/callback-server-launch-route.test.ts b/packages/ai/test/callback-server-launch-route.test.ts
index 3d22b4205..9272a5f73 100644
--- a/packages/ai/test/callback-server-launch-route.test.ts
+++ b/packages/ai/test/callback-server-launch-route.test.ts
@@ -114,6 +114,24 @@ describe("OAuthCallbackFlow /launch route", () => {
 		await login;
 	});
 
+	it("serves success copy that permits manual tab close", async () => {
+		const { info, login } = await startFlowAndWaitForAuth();
+		const authUrl = new URL(info.url);
+		const redirectUri = authUrl.searchParams.get("redirect_uri");
+		expect(redirectUri).toMatch(/^http:\/\/localhost:\d+\/callback$/);
+		const state = authUrl.searchParams.get("state") ?? "";
+
+		const callbackResponse = await fetch(`${redirectUri}?code=test-code&state=${encodeURIComponent(state)}`);
+		expect(callbackResponse.status).toBe(200);
+		const html = await callbackResponse.text();
+
+		expect(html).toContain("Authentication Successful");
+		expect(html).toContain("You have successfully logged in.<br>You can now close this tab.");
+		expect(html).toContain("Close Window");
+		expect(html).not.toContain("This window will close automatically.");
+		await login;
+	});
+
 	it("suppresses launchUrl and routes /launch to the callback handler when callbackPath is /launch", async () => {
 		const abort = new AbortController();
 		const authFired = Promise.withResolvers<OAuthAuthInfo>();
diff --git a/packages/coding-agent/src/prompts/system/workflow-notice.md b/packages/coding-agent/src/prompts/system/workflow-notice.md
index 74eddee21..3e62ca5b0 100644
--- a/packages/coding-agent/src/prompts/system/workflow-notice.md
+++ b/packages/coding-agent/src/prompts/system/workflow-notice.md
@@ -51,20 +51,20 @@ Decompose first, then {{#if taskBatch}}batch the independent leaves{{else}}issue
 
 {{#if taskBatch}}
     task(
-      context: "# Goal\nReview the auth diff...\n# Constraints\nRead-only...\n# Contract\nReturn findings as severity/file/line/fix...",
+      context: "# Goal\nReview the auth diff…\n# Constraints\nRead-only…\n# Contract\nReturn findings as severity/file/line/fix…",
       tasks: [
-        { id: "AuthOwner", role: "Auth Storage Reviewer", assignment: "# Target\npackages/ai/src/auth-storage.ts\n# Change\nTrace credential selection...\n# Acceptance\nReturn confirmed findings only..." },
-        { id: "PromptOwner", role: "Prompt Contract Reviewer", assignment: "# Target\npackages/coding-agent/src/prompts/**\n# Change\nCheck active-tool guidance...\n# Acceptance\nReturn mismatches and exact prompt lines..." },
+        { id: "AuthOwner", role: "Auth Storage Reviewer", assignment: "# Target\npackages/ai/src/auth-storage.ts\n# Change\nTrace credential selection…\n# Acceptance\nReturn confirmed findings only…" },
+        { id: "PromptOwner", role: "Prompt Contract Reviewer", assignment: "# Target\npackages/coding-agent/src/prompts/**\n# Change\nCheck active-tool guidance…\n# Acceptance\nReturn mismatches and exact prompt lines…" },
       ]
     )
 {{else}}
     task(
       role: "Auth Storage Reviewer",
-      assignment: "# Target\npackages/ai/src/auth-storage.ts\n# Change\nReview the auth diff. Shared contract: read-only; return findings as severity/file/line/fix.\n# Acceptance\nReturn confirmed findings only..."
+      assignment: "# Target\npackages/ai/src/auth-storage.ts\n# Change\nReview the auth diff. Shared contract: read-only; return findings as severity/file/line/fix.\n# Acceptance\nReturn confirmed findings only…"
     )
     task(
       role: "Prompt Contract Reviewer",
-      assignment: "# Target\npackages/coding-agent/src/prompts/**\n# Change\nCheck active-tool guidance. Shared contract: read-only; return mismatches and exact prompt lines.\n# Acceptance\nReturn confirmed findings only..."
+      assignment: "# Target\npackages/coding-agent/src/prompts/**\n# Change\nCheck active-tool guidance. Shared contract: read-only; return mismatches and exact prompt lines.\n# Acceptance\nReturn confirmed findings only…"
     )
 {{/if}}