diff --git a/browser_cli/__init__.py b/browser_cli/__init__.py
index 00d9607..aeee79b 100644
--- a/browser_cli/__init__.py
+++ b/browser_cli/__init__.py
@@ -77,6 +77,7 @@ class BrowserCLI:
             id=data["id"],
             window_id=data.get("windowId", 0),
             active=data.get("active", False),
+            muted=data.get("muted", False),
             title=data.get("title") or "",
             url=data.get("url") or "",
             group_id=data.get("groupId") or None,
@@ -172,6 +173,16 @@ class BrowserCLI:
         """Switch browser focus to a tab by ID."""
         self._cmd("tabs.active", {"tabId": tab_id})
 
+    def tabs_mute(self, tab_id: int | None = None) -> int:
+        """Mute the active tab or a specific tab. Returns the target tab ID."""
+        result = self._cmd("tabs.mute", {"tabId": tab_id})
+        return result.get("tabId", tab_id) if isinstance(result, dict) else int(tab_id or 0)
+
+    def tabs_unmute(self, tab_id: int | None = None) -> int:
+        """Unmute the active tab or a specific tab. Returns the target tab ID."""
+        result = self._cmd("tabs.unmute", {"tabId": tab_id})
+        return result.get("tabId", tab_id) if isinstance(result, dict) else int(tab_id or 0)
+
     def window_active_tab(self, window_id: int) -> Tab:
         """Return active tab for a specific browser window."""
         data = self._cmd("tabs.active_in_window", {"windowId": window_id})
diff --git a/browser_cli/commands/tabs.py b/browser_cli/commands/tabs.py
index df36538..d7053b4 100644
--- a/browser_cli/commands/tabs.py
+++ b/browser_cli/commands/tabs.py
@@ -44,15 +44,18 @@ def _print_tabs(tabs: list[dict], *, show_browser: bool = False) -> None:
     table.add_column("ID", style="dim", no_wrap=True)
     table.add_column("Window", no_wrap=True)
     table.add_column("Active", width=7)
+    table.add_column("Muted", width=7)
     table.add_column("Title")
     table.add_column("URL")
     for t in tabs:
         active = "[green]✓[/green]" if t.get("active") else ""
+        muted = "[yellow]✓[/yellow]" if t.get("muted") else ""
         row = [
             t.get("browser", "") if show_browser else None,
             str(t.get("id", "")),
             str(t.get("windowId", "")),
             active,
+            muted,
             (t.get("title") or "")[:60],
             (t.get("url") or "")[:80],
         ]
@@ -198,3 +201,21 @@ def tabs_merge_windows():
     result = _handle("tabs.merge_windows")
     count = result.get("moved", 0) if isinstance(result, dict) else 0
     console.print(f"[green]Merged — moved {count} tab(s) into current window[/green]")
+
+
+@tabs_group.command("mute")
+@click.argument("tab_id", type=int, required=False)
+def tabs_mute(tab_id):
+    """Mute the active tab or a specific tab."""
+    result = _handle("tabs.mute", {"tabId": tab_id})
+    target = result.get("tabId", tab_id) if isinstance(result, dict) else tab_id
+    console.print(f"[green]Muted tab {target}[/green]")
+
+
+@tabs_group.command("unmute")
+@click.argument("tab_id", type=int, required=False)
+def tabs_unmute(tab_id):
+    """Unmute the active tab or a specific tab."""
+    result = _handle("tabs.unmute", {"tabId": tab_id})
+    target = result.get("tabId", tab_id) if isinstance(result, dict) else tab_id
+    console.print(f"[green]Unmuted tab {target}[/green]")
diff --git a/browser_cli/models.py b/browser_cli/models.py
index 0f18224..066a924 100644
--- a/browser_cli/models.py
+++ b/browser_cli/models.py
@@ -29,6 +29,7 @@ class Tab:
     id: int
     window_id: int
     active: bool
+    muted: bool
     title: str
     url: str
     group_id: int | None = None
@@ -48,6 +49,14 @@ class Tab:
         """Switch browser focus to this tab."""
         self._b()._cmd("tabs.active", {"tabId": self.id})
 
+    def mute(self) -> None:
+        """Mute this tab."""
+        self._b()._cmd("tabs.mute", {"tabId": self.id})
+
+    def unmute(self) -> None:
+        """Unmute this tab."""
+        self._b()._cmd("tabs.unmute", {"tabId": self.id})
+
     def reload(self) -> None:
         """Reload this tab."""
         self._b()._cmd("navigate.reload", {"tabId": self.id})
diff --git a/extension/background.js b/extension/background.js
index ce6f4b3..3057264 100644
--- a/extension/background.js
+++ b/extension/background.js
@@ -141,6 +141,8 @@ async function dispatch(command, args) {
     case "tabs.dedupe":       return tabsDedupe();
     case "tabs.sort":         return tabsSort(args);
     case "tabs.merge_windows": return tabsMergeWindows();
+    case "tabs.mute":         return tabsMute(args);
+    case "tabs.unmute":       return tabsUnmute(args);
 
     // ── Groups ────────────────────────────────────────────────────────────
     case "group.list":   return groupList();
@@ -439,8 +441,27 @@ async function tabsMergeWindows() {
   return { moved };
 }
 
+async function tabsMute({ tabId }) {
+  const tab = tabId ? await chrome.tabs.get(tabId) : await getActiveTab();
+  await chrome.tabs.update(tab.id, { muted: true });
+  return { tabId: tab.id, muted: true };
+}
+
+async function tabsUnmute({ tabId }) {
+  const tab = tabId ? await chrome.tabs.get(tabId) : await getActiveTab();
+  await chrome.tabs.update(tab.id, { muted: false });
+  return { tabId: tab.id, muted: false };
+}
+
 function tabInfo(t) {
-  return { id: t.id, windowId: t.windowId, active: t.active, title: t.title, url: t.url };
+  return {
+    id: t.id,
+    windowId: t.windowId,
+    active: t.active,
+    muted: Boolean(t.mutedInfo && t.mutedInfo.muted),
+    title: t.title,
+    url: t.url,
+  };
 }
 
 // ── Groups ────────────────────────────────────────────────────────────────────
diff --git a/extension/manifest.json b/extension/manifest.json
index 18dce74..d804061 100644
--- a/extension/manifest.json
+++ b/extension/manifest.json
@@ -1,7 +1,7 @@
 {
   "manifest_version": 3,
   "name": "browser-cli",
-  "version": "0.5.8",
+  "version": "0.5.10",
   "description": "Control your browser from the terminal via browser-cli",
   "permissions": [
     "tabs",
diff --git a/pyproject.toml b/pyproject.toml
index 54867c8..7d68acc 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "browser-cli"
-version = "0.5.8"
+version = "0.5.10"
 description = "Control your real running browser from the terminal via a Chrome extension"
 requires-python = ">=3.10"
 dependencies = [
diff --git a/tests/test_tabs.py b/tests/test_tabs.py
index 669b82c..45d5410 100644
--- a/tests/test_tabs.py
+++ b/tests/test_tabs.py
@@ -12,6 +12,7 @@ def test_tabs_list(browser):
     assert "windowId" in first
     assert "url" in first
     assert "title" in first
+    assert "muted" in first
 
 
 def test_tabs_count(browser):
@@ -114,3 +115,21 @@ def test_tabs_merge_windows_no_crash(browser):
     result = browser("tabs.merge_windows")
     assert isinstance(result, dict)
     assert "moved" in result
+
+
+def test_tabs_mute_and_unmute(browser, http_tab):
+    muted = browser("tabs.mute", {"tabId": http_tab["id"]})
+    assert isinstance(muted, dict)
+    assert muted["tabId"] == http_tab["id"]
+    assert muted["muted"] is True
+    listed = browser("tabs.list")
+    listed_tab = next(t for t in listed if t["id"] == http_tab["id"])
+    assert listed_tab["muted"] is True
+
+    unmuted = browser("tabs.unmute", {"tabId": http_tab["id"]})
+    assert isinstance(unmuted, dict)
+    assert unmuted["tabId"] == http_tab["id"]
+    assert unmuted["muted"] is False
+    listed = browser("tabs.list")
+    listed_tab = next(t for t in listed if t["id"] == http_tab["id"])
+    assert listed_tab["muted"] is False