diff --git a/src/FirmwarePlugin/APM/APMFirmwarePlugin.cc b/src/FirmwarePlugin/APM/APMFirmwarePlugin.cc
index 492cf96fafd241d4773d7e22cd4b445f24c86f85..f12c6314de195328cfe30f57f6167e0b1e9f2da2 100644
--- a/src/FirmwarePlugin/APM/APMFirmwarePlugin.cc
+++ b/src/FirmwarePlugin/APM/APMFirmwarePlugin.cc
@@ -16,6 +16,7 @@
 #include "APMSensorsComponentController.h"
 #include "MissionManager.h"
 #include "ParameterManager.h"
+#include "QGCFileDownload.h"
 
 #include <QTcpSocket>
 
@@ -1004,3 +1005,25 @@ void APMFirmwarePlugin::startMission(Vehicle* vehicle)
         vehicle->sendMavCommand(vehicle->defaultComponentId(), MAV_CMD_MISSION_START, true /*show error */);
     }
 }
+
+QString APMFirmwarePlugin::_getLatestVersionFileUrl(Vehicle* vehicle)
+{
+    const static QString baseUrl("http://firmware.ardupilot.org/%1/stable/PX4/git-version.txt");
+    if (vehicle->fixedWing()) {
+        return baseUrl.arg("Plane");
+    }
+    if (vehicle->vtol()) {
+        return baseUrl.arg("Plane");
+    }
+    if (vehicle->rover()) {
+        return baseUrl.arg("Rover");
+    }
+    if (vehicle->sub()) {
+        return baseUrl.arg("Sub");
+    }
+    return baseUrl.arg("Copter");
+}
+
+QString APMFirmwarePlugin::_versionRegex() {
+    return QStringLiteral(" V([0-9,\\.]*)$");
+}
diff --git a/src/FirmwarePlugin/APM/APMFirmwarePlugin.h b/src/FirmwarePlugin/APM/APMFirmwarePlugin.h
index 30a9fd8d8ef6415ce46ed1b3caec28822d41f201..37bbf5b34afe0ac698a98342e5c0eed6a0dfff82 100644
--- a/src/FirmwarePlugin/APM/APMFirmwarePlugin.h
+++ b/src/FirmwarePlugin/APM/APMFirmwarePlugin.h
@@ -127,6 +127,8 @@ private:
     void _handleOutgoingParamSet(Vehicle* vehicle, LinkInterface* outgoingLink, mavlink_message_t* message);
     void _soloVideoHandshake(Vehicle* vehicle, bool originalSoloFirmware);
     bool _guidedModeTakeoff(Vehicle* vehicle, double altitudeRel);
+    QString _getLatestVersionFileUrl(Vehicle* vehicle) override;
+    QString _versionRegex() override;
 
     // Any instance data here must be global to all vehicles
     // Vehicle specific data should go into APMFirmwarePluginInstanceData
diff --git a/src/FirmwarePlugin/FirmwarePlugin.cc b/src/FirmwarePlugin/FirmwarePlugin.cc
index a4fdca048d8c75ff0a6868fc444fcea8be46060b..e798feb9964f14dbdb68c789a6ed6b30afa3e2c9 100644
--- a/src/FirmwarePlugin/FirmwarePlugin.cc
+++ b/src/FirmwarePlugin/FirmwarePlugin.cc
@@ -13,9 +13,13 @@
 #include "CameraMetaData.h"
 #include "SettingsManager.h"
 #include "AppSettings.h"
+#include "QGCFileDownload.h"
 
+#include <QRegularExpression>
 #include <QDebug>
 
+QGC_LOGGING_CATEGORY(FirmwarePluginLog, "FirmwarePluginLog")
+
 static FirmwarePluginFactoryRegister* _instance = NULL;
 
 const QString guided_mode_not_supported_by_vehicle = QObject::tr("Guided mode not supported by Vehicle.");
@@ -663,3 +667,76 @@ uint32_t FirmwarePlugin::highLatencyCustomModeTo32Bits(uint16_t hlCustomMode)
     return hlCustomMode;
 }
 
+void FirmwarePlugin::checkIfIsLatestStable(Vehicle* vehicle)
+{
+    // This is required as mocklink uses a hardcoded firmware version
+    if (qgcApp()->runningUnitTests()) {
+        qCDebug(FirmwarePluginLog) << "Skipping version check";
+        return;
+    }
+    QString versionFile = _getLatestVersionFileUrl(vehicle);
+    qCDebug(FirmwarePluginLog) << "Downloading" << versionFile;
+    QGCFileDownload* downloader = new QGCFileDownload(this);
+    connect(
+        downloader,
+        &QGCFileDownload::downloadFinished,
+        this,
+        [vehicle, this](QString remoteFile, QString localFile) {
+            _versionFileDownloadFinished(remoteFile, localFile, vehicle);
+            sender()->deleteLater();
+        });
+    downloader->download(versionFile);
+}
+
+void FirmwarePlugin::_versionFileDownloadFinished(QString& remoteFile, QString& localFile, Vehicle* vehicle)
+{
+    qCDebug(FirmwarePluginLog) << "Download complete" << remoteFile << localFile;
+    // Now read the version file and pull out the version string
+    QFile versionFile(localFile);
+    if (!versionFile.open(QIODevice::ReadOnly | QIODevice::Text)) {
+        qCWarning(FirmwarePluginLog) << "Error opening downloaded version file.";
+        return;
+    }
+
+    QTextStream stream(&versionFile);
+    QString versionFileContents = stream.readAll();
+    QString version;
+    QRegularExpressionMatch match = QRegularExpression(_versionRegex()).match(versionFileContents);
+
+    qCDebug(FirmwarePluginLog) << "Looking for version number...";
+
+    if (match.hasMatch()) {
+        version = match.captured(1);
+    } else {
+        qCWarning(FirmwarePluginLog) << "Unable to parse version info from file" << remoteFile;
+        return;
+    }
+
+    qCDebug(FirmwarePluginLog) << "Latest stable version = "  << version;
+    QStringList versionNumbers = version.split(".");
+    if(versionNumbers.size() != 3) {
+        qCWarning(FirmwarePluginLog) << "Error parsing version number: wrong format";
+        return;
+    }
+    int stableMajor = versionNumbers[0].toInt();
+    int stableMinor = versionNumbers[1].toInt();
+    int stablePatch = versionNumbers[2].toInt();
+
+    int currMajor = vehicle->firmwareMajorVersion();
+    int currMinor = vehicle->firmwareMinorVersion();
+    int currPatch = vehicle->firmwarePatchVersion();
+    int currType = vehicle->firmwareVersionType();
+
+    if (currMajor < stableMajor
+        || (currMajor == stableMajor && currMinor < stableMinor)
+        || (currMajor == stableMajor && currMinor == stableMinor && currPatch < stablePatch)
+        || (currMajor == stableMajor && currMinor == stableMinor && currPatch == stablePatch && currType != FIRMWARE_VERSION_TYPE_OFFICIAL)
+        )
+    {
+        const static QString currentVersion = QString("%1.%2.%3").arg(vehicle->firmwareMajorVersion())
+                                                                 .arg(vehicle->firmwareMinorVersion())
+                                                                 .arg(vehicle->firmwarePatchVersion());
+        const static QString message = tr("Vehicle is not running latest stable firmware! Running %2-%1, latest stable is %3.");
+        qgcApp()->showMessage(message.arg(vehicle->firmwareVersionTypeString(), currentVersion, version));
+    }
+}
diff --git a/src/FirmwarePlugin/FirmwarePlugin.h b/src/FirmwarePlugin/FirmwarePlugin.h
index 22020443aa4ca4c94958d3a50254adbad3858b2b..b13f145fa003923fb63971d875301b80c527b3e1 100644
--- a/src/FirmwarePlugin/FirmwarePlugin.h
+++ b/src/FirmwarePlugin/FirmwarePlugin.h
@@ -306,6 +306,9 @@ public:
     /// Convert from HIGH_LATENCY2.custom_mode value to correct 32 bit value.
     virtual uint32_t highLatencyCustomModeTo32Bits(uint16_t hlCustomMode);
 
+    /// Used to check if running firmware is latest stable version.
+    virtual void checkIfIsLatestStable(Vehicle* vehicle);
+
     // FIXME: Hack workaround for non pluginize FollowMe support
     static const QString px4FollowMeFlightMode;
 
@@ -321,6 +324,15 @@ protected:
     // @return: true - vehicle in specified flight mode, false - flight mode change failed
     bool _setFlightModeAndValidate(Vehicle* vehicle, const QString& flightMode);
 
+    // returns url with latest firmware release information.
+    virtual QString _getLatestVersionFileUrl(Vehicle* vehicle) { Q_UNUSED(vehicle); return QString(); }
+
+    // Callback to process file with latest release information
+    virtual void _versionFileDownloadFinished(QString& remoteFile, QString& localFile, Vehicle* vehicle);
+
+    // Returns regex QString to extract version information from text
+    virtual QString _versionRegex() { return QString(); }
+
 private:
     QVariantList _toolBarIndicatorList;
     static QVariantList _cameraList;    ///< Standard QGC camera list
diff --git a/src/FirmwarePlugin/PX4/PX4FirmwarePlugin.cc b/src/FirmwarePlugin/PX4/PX4FirmwarePlugin.cc
index ea1f2d7a6945577542d8152aa48c12fe7195e85e..c85bb70db9289980e4e28409cda380907bc1128d 100644
--- a/src/FirmwarePlugin/PX4/PX4FirmwarePlugin.cc
+++ b/src/FirmwarePlugin/PX4/PX4FirmwarePlugin.cc
@@ -22,6 +22,7 @@
 #include "PowerComponentController.h"
 #include "RadioComponentController.h"
 #include "QGCCameraManager.h"
+#include "QGCFileDownload.h"
 
 #include <QDebug>
 
@@ -597,3 +598,12 @@ uint32_t PX4FirmwarePlugin::highLatencyCustomModeTo32Bits(uint16_t hlCustomMode)
 
     return px4_cm.data;
 }
+
+QString PX4FirmwarePlugin::_getLatestVersionFileUrl(Vehicle* vehicle){
+    Q_UNUSED(vehicle);
+    return QStringLiteral("https://api.github.com/repos/PX4/Firmware/releases");
+}
+
+QString PX4FirmwarePlugin::_versionRegex() {
+    return QStringLiteral("v([0-9,\\.]*) Stable");
+}
diff --git a/src/FirmwarePlugin/PX4/PX4FirmwarePlugin.h b/src/FirmwarePlugin/PX4/PX4FirmwarePlugin.h
index f4118c260aa28f05280201723afcdc01c20b17e3..24628433a00a866efe72e822aee44ecfd6f0556b 100644
--- a/src/FirmwarePlugin/PX4/PX4FirmwarePlugin.h
+++ b/src/FirmwarePlugin/PX4/PX4FirmwarePlugin.h
@@ -111,6 +111,8 @@ private slots:
 
 private:
     void _handleAutopilotVersion(Vehicle* vehicle, mavlink_message_t* message);
+    QString _getLatestVersionFileUrl(Vehicle* vehicle) override;
+    QString _versionRegex() override;
 
     // Any instance data here must be global to all vehicles
     // Vehicle specific data should go into PX4FirmwarePluginInstanceData
diff --git a/src/Vehicle/Vehicle.cc b/src/Vehicle/Vehicle.cc
index 85ebddb38e7865555349c5b301d4c976dd09c4ef..6fb24bcb393aa10b2729f81ffe5ba7df2c64bc0c 100644
--- a/src/Vehicle/Vehicle.cc
+++ b/src/Vehicle/Vehicle.cc
@@ -1239,6 +1239,7 @@ void Vehicle::_handleAutopilotVersion(LinkInterface *link, mavlink_message_t& me
         // APM Firmware stores the first 8 characters of the git hash as an ASCII character string
         _gitHash = QString::fromUtf8((char*)autopilotVersion.flight_custom_version, 8);
     }
+    _firmwarePlugin->checkIfIsLatestStable(this);
     emit gitHashChanged(_gitHash);
 
     _setCapabilities(autopilotVersion.capabilities);