diff --git a/homeassistant/components/fritz/coordinator.py b/homeassistant/components/fritz/coordinator.py
index 5915804aa138..005d85e9e1c9 100644
--- a/homeassistant/components/fritz/coordinator.py
+++ b/homeassistant/components/fritz/coordinator.py
@@ -938,3 +938,15 @@ class AvmWrapper(FritzBoxTools):
             "X_AVM-DE_WakeOnLANByMACAddress",
             NewMACAddress=mac_address,
         )
+
+    async def async_get_firmware_extra_infos(self) -> dict[str, Any]:
+        """Return extra infos for firmware."""
+        return await self._async_service_call("UserInterface", "1", "X_AVM-DE_GetInfo")
+
+    async def async_get_device_uptime_hours(self) -> int:
+        """Get device uptime in hours."""
+
+        def _get_uptime_hours() -> int:
+            return int(self.fritz_status.device_uptime // 3600)
+
+        return await self.hass.async_add_executor_job(_get_uptime_hours)
diff --git a/homeassistant/components/fritz/diagnostics.py b/homeassistant/components/fritz/diagnostics.py
index 43ed80f6396d..0165e37de0c3 100644
--- a/homeassistant/components/fritz/diagnostics.py
+++ b/homeassistant/components/fritz/diagnostics.py
@@ -24,9 +24,11 @@ async def async_get_config_entry_diagnostics(
             "unique_id": avm_wrapper.unique_id.replace(
                 avm_wrapper.unique_id[6:11], "XX:XX"
             ),
+            "device_uptime_hours": await avm_wrapper.async_get_device_uptime_hours(),
             "current_firmware": avm_wrapper.current_firmware,
             "latest_firmware": avm_wrapper.latest_firmware,
             "update_available": avm_wrapper.update_available,
+            "firmware_extra_infos": await avm_wrapper.async_get_firmware_extra_infos(),
             "connection_type": avm_wrapper.device_conn_type,
             "is_router": avm_wrapper.device_is_router,
             "mesh_role": avm_wrapper.mesh_role,
diff --git a/tests/components/fritz/const.py b/tests/components/fritz/const.py
index 4415f563ffd9..3e6d9741ca9c 100644
--- a/tests/components/fritz/const.py
+++ b/tests/components/fritz/const.py
@@ -97,6 +97,14 @@ MOCK_FB_SERVICES: dict[str, dict[str, Any]] = {
     },
     "UserInterface1": {
         "GetInfo": {},
+        "X_AVM-DE_GetInfo": {
+            "NewX_AVM-DE_AutoUpdateMode": "notify",
+            "NewX_AVM-DE_UpdateTime": "2026-05-17T18:54:37+02:00",
+            "NewX_AVM-DE_LastFwVersion": "256.08.20,124233",
+            "NewX_AVM-DE_LastInfoUrl": "http://download.avm.de/fritzbox/fritzbox-7530-ax/deutschland/fritz.os/info_en.txt",
+            "NewX_AVM-DE_CurrentFwVersion": "256.08.25",
+            "NewX_AVM-DE_UpdateSuccessful": "succeeded",
+        },
     },
     "WANCommonIFC1": {
         "GetCommonLinkProperties": {
diff --git a/tests/components/fritz/snapshots/test_diagnostics.ambr b/tests/components/fritz/snapshots/test_diagnostics.ambr
index f67aaf40bcd9..af5fe8460dc1 100644
--- a/tests/components/fritz/snapshots/test_diagnostics.ambr
+++ b/tests/components/fritz/snapshots/test_diagnostics.ambr
@@ -25,6 +25,7 @@
         'NAS': 'none',
         'Phone': 'readwrite',
       }),
+      'device_uptime_hours': 699,
       'discovered_services': list([
         'DeviceInfo1',
         'Hosts1',
@@ -43,6 +44,14 @@
         'X_AVM-DE_HostFilter1',
         'X_AVM-DE_UPnP1',
       ]),
+      'firmware_extra_infos': dict({
+        'NewX_AVM-DE_AutoUpdateMode': 'notify',
+        'NewX_AVM-DE_CurrentFwVersion': '256.08.25',
+        'NewX_AVM-DE_LastFwVersion': '256.08.20,124233',
+        'NewX_AVM-DE_LastInfoUrl': 'http://download.avm.de/fritzbox/fritzbox-7530-ax/deutschland/fritz.os/info_en.txt',
+        'NewX_AVM-DE_UpdateSuccessful': 'succeeded',
+        'NewX_AVM-DE_UpdateTime': '2026-05-17T18:54:37+02:00',
+      }),
       'is_router': True,
       'last_exception': None,
       'last_update success': True,