diff --git a/src/browser/chrome.ts b/src/browser/chrome.ts
index 8e0909211..946114421 100644
--- a/src/browser/chrome.ts
+++ b/src/browser/chrome.ts
@@ -4,8 +4,7 @@ import os from "node:os";
 import path from "node:path";
 
 import { ensurePortAvailable } from "../infra/ports.js";
-import { logInfo, logWarn } from "../logger.js";
-import { defaultRuntime, type RuntimeEnv } from "../runtime.js";
+import { createSubsystemLogger } from "../logging.js";
 import { CONFIG_DIR } from "../utils.js";
 import type { ResolvedBrowserConfig } from "./config.js";
 import {
@@ -13,6 +12,8 @@ import {
   DEFAULT_CLAWD_BROWSER_PROFILE_NAME,
 } from "./constants.js";
 
+const log = createSubsystemLogger("browser").child("chrome");
+
 export type BrowserExecutable = {
   kind: "canary" | "chromium" | "chrome";
   path: string;
@@ -321,7 +322,6 @@ export async function isChromeReachable(
 
 export async function launchClawdChrome(
   resolved: ResolvedBrowserConfig,
-  runtime: RuntimeEnv = defaultRuntime,
 ): Promise<RunningChrome> {
   await ensurePortAvailable(resolved.cdpPort);
 
@@ -404,15 +404,9 @@ export async function launchClawdChrome(
   if (needsDecorate) {
     try {
       decorateClawdProfile(userDataDir, { color: resolved.color });
-      logInfo(
-        `🦞 clawd browser profile decorated (${resolved.color})`,
-        runtime,
-      );
+      log.info(`🦞 clawd browser profile decorated (${resolved.color})`);
     } catch (err) {
-      logWarn(
-        `clawd browser profile decoration failed: ${String(err)}`,
-        runtime,
-      );
+      log.warn(`clawd browser profile decoration failed: ${String(err)}`);
     }
   }
 
@@ -434,9 +428,8 @@ export async function launchClawdChrome(
   }
 
   const pid = proc.pid ?? -1;
-  logInfo(
+  log.info(
     `🦞 clawd browser started (${exe.kind}) on 127.0.0.1:${resolved.cdpPort} (pid ${pid})`,
-    runtime,
   );
 
   return {
diff --git a/src/browser/server-context.ts b/src/browser/server-context.ts
index c95f34406..255eb9127 100644
--- a/src/browser/server-context.ts
+++ b/src/browser/server-context.ts
@@ -1,6 +1,5 @@
 import type { Server } from "node:http";
 
-import type { RuntimeEnv } from "../runtime.js";
 import { createTargetViaCdp } from "./cdp.js";
 import {
   isChromeReachable,
@@ -41,7 +40,6 @@ export type BrowserRouteContext = {
 };
 
 type ContextOptions = {
-  runtime: RuntimeEnv;
   getState: () => BrowserServerState | null;
   setRunning: (running: RunningChrome | null) => void;
 };
@@ -172,7 +170,7 @@ export function createBrowserRouteContext(
       );
     }
 
-    const launched = await launchClawdChrome(current.resolved, opts.runtime);
+    const launched = await launchClawdChrome(current.resolved);
     opts.setRunning(launched);
     launched.proc.on("exit", () => {
       const live = opts.getState();
diff --git a/src/browser/server.ts b/src/browser/server.ts
index 4bf79d6be..f08858e64 100644
--- a/src/browser/server.ts
+++ b/src/browser/server.ts
@@ -2,8 +2,7 @@ import type { Server } from "node:http";
 import express from "express";
 
 import { loadConfig } from "../config/config.js";
-import { logError, logInfo, logWarn } from "../logger.js";
-import { defaultRuntime, type RuntimeEnv } from "../runtime.js";
+import { createSubsystemLogger } from "../logging.js";
 import {
   resolveBrowserConfig,
   shouldStartLocalBrowserServer,
@@ -15,9 +14,10 @@ import {
 } from "./server-context.js";
 
 let state: BrowserServerState | null = null;
+const log = createSubsystemLogger("browser");
+const logServer = log.child("server");
 
 export async function startBrowserControlServerFromConfig(
-  runtime: RuntimeEnv = defaultRuntime,
 ): Promise<BrowserServerState | null> {
   if (state) return state;
 
@@ -26,9 +26,8 @@ export async function startBrowserControlServerFromConfig(
   if (!resolved.enabled) return null;
 
   if (!shouldStartLocalBrowserServer(resolved)) {
-    logInfo(
+    logServer.info(
       `browser control URL is non-loopback (${resolved.controlUrl}); skipping local server start`,
-      runtime,
     );
     return null;
   }
@@ -37,7 +36,6 @@ export async function startBrowserControlServerFromConfig(
   app.use(express.json({ limit: "1mb" }));
 
   const ctx = createBrowserRouteContext({
-    runtime,
     getState: () => state,
     setRunning: (running) => {
       if (state) state.running = running;
@@ -50,9 +48,8 @@ export async function startBrowserControlServerFromConfig(
     const s = app.listen(port, "127.0.0.1", () => resolve(s));
     s.once("error", reject);
   }).catch((err) => {
-    logError(
+    logServer.error(
       `clawd browser server failed to bind 127.0.0.1:${port}: ${String(err)}`,
-      runtime,
     );
     return null;
   });
@@ -67,21 +64,18 @@ export async function startBrowserControlServerFromConfig(
     resolved,
   };
 
-  logInfo(
+  logServer.info(
     `🦞 clawd browser control listening on http://127.0.0.1:${port}/`,
-    runtime,
   );
   return state;
 }
 
 export async function stopBrowserControlServer(
-  runtime: RuntimeEnv = defaultRuntime,
 ): Promise<void> {
   const current = state;
   if (!current) return;
 
   const ctx = createBrowserRouteContext({
-    runtime,
     getState: () => state,
     setRunning: (running) => {
       if (state) state.running = running;
@@ -91,7 +85,7 @@ export async function stopBrowserControlServer(
   try {
     await ctx.stopRunningBrowser();
   } catch (err) {
-    logWarn(`clawd browser stop failed: ${String(err)}`, runtime);
+    logServer.warn(`clawd browser stop failed: ${String(err)}`);
   }
 
   await new Promise<void>((resolve) => {