diff --git a/index.html b/index.html
index 33ccd07e..8cb41177 100644
--- a/index.html
+++ b/index.html
@@ -778,7 +778,7 @@ <h5 class="modal-title-revision"></h5>
                                             const axes = ['Roll', 'Pitch', 'Yaw'];
                                             const pidTbody = document.getElementById('pid_tbody');
 
-                                            axes.forEach(axis => {
+                                            for (const axis of axes) {
                                                 const row = `<tr class="${axis.toLowerCase()}PID">
                                                                 <td>${axis}</td>
                                                                 <td><input type="text" name="p" step="1" min="0" max="255" /></td>
@@ -788,7 +788,7 @@ <h5 class="modal-title-revision"></h5>
                                                                 <td><input type="text" name="f" step="1" min="0" max="255" /></td>
                                                             </tr>`;
                                                 pidTbody.innerHTML += row;
-                                            });
+                                            }
                                         </script>
 
                                         <table id="pid_baro_header" class="parameter cf">
@@ -1516,7 +1516,11 @@ <h5 class="modal-title-revision"></h5>
                                                             <!-- list generated here -->
                                                         </select>
                                                     </td>
-                                                   <td name='gyro_hardware_lpf'>
+                                                    <td name='gyro_enabled_bitmask'>
+                                                        <label>Gyro enable mask</label>
+                                                        <input type="text" step="1" min="1" max="255" />
+                                                    </td>
+                                                    <td name='gyro_hardware_lpf'>
                                                         <label>Hardware gyro LPF</label>
                                                         <select>
                                                             <!-- list generated here -->
diff --git a/src/flightlog_parser.js b/src/flightlog_parser.js
index e89a6974..44433629 100644
--- a/src/flightlog_parser.js
+++ b/src/flightlog_parser.js
@@ -299,6 +299,7 @@ export function FlightLogParser(logData) {
       fields_disabled_mask: null,
       vbat_sag_compensation: null,
       gyro_to_use: null,
+      gyro_enabled_bitmask: null,
       dynamic_idle_min_rpm: null,
       motor_poles: 1,
       ff_transition: null,
@@ -532,7 +533,7 @@ export function FlightLogParser(logData) {
    */
   function translateFieldName(fieldName) {
     let translation = translationValues[fieldName];
-    if (typeof translation !== "undefined") {
+    if (translation !== undefined) {
       return translation;
     } else {
       return fieldName;
@@ -743,6 +744,7 @@ export function FlightLogParser(logData) {
       case "fields_disabled_mask":
       case "motor_pwm_protocol":
       case "gyro_to_use":
+      case "gyro_enabled_bitmask":
       case "dynamic_idle_min_rpm":
       case "dyn_idle_p_gain":
       case "dyn_idle_i_gain":
@@ -821,7 +823,7 @@ export function FlightLogParser(logData) {
         ) {
           that.sysConfig[fieldName] = parseInt(fieldValue, 10);
         } else {
-          that.sysConfig[fieldName] = parseInt(fieldValue, 10) / 100.0;
+          that.sysConfig[fieldName] = parseInt(fieldValue, 10) / 100;
         }
         break;
 
@@ -835,13 +837,13 @@ export function FlightLogParser(logData) {
         ) {
           that.sysConfig[fieldName] = parseCommaSeparatedString(fieldValue);
         } else {
-          that.sysConfig[fieldName] = parseInt(fieldValue, 10) / 100.0;
+          that.sysConfig[fieldName] = parseInt(fieldValue, 10) / 100;
         }
         break;
 
       case "motor_idle":
       case "digitalIdleOffset":
-        that.sysConfig[fieldName] = parseInt(fieldValue, 10) / 100.0;
+        that.sysConfig[fieldName] = parseInt(fieldValue, 10) / 100;
 
       /**  Cleanflight Only log headers **/
       case "dterm_cut_hz":
@@ -982,7 +984,7 @@ export function FlightLogParser(logData) {
           } else {
             // Cleanflight 1.x and others
             that.sysConfig.firmwareVersion = "0.0.0";
-            that.sysConfig.firmware = 0.0;
+            that.sysConfig.firmware = 0;
             that.sysConfig.firmwarePatch = 0;
           }
         }
@@ -1083,10 +1085,8 @@ export function FlightLogParser(logData) {
           min: frame[i],
         };
       } else {
-        fieldStats[i].max =
-          frame[i] > fieldStats[i].max ? frame[i] : fieldStats[i].max;
-        fieldStats[i].min =
-          frame[i] < fieldStats[i].min ? frame[i] : fieldStats[i].min;
+        fieldStats[i].max = Math.max(frame[i], fieldStats[i].max);
+        fieldStats[i].min = Math.min(frame[i], fieldStats[i].min);
       }
     }
   }
@@ -1444,7 +1444,7 @@ export function FlightLogParser(logData) {
          * save space for positive values). So we need to convert those very large unsigned values into their
          * corresponding 32-bit signed values.
          */
-        value = (value | 0) + that.sysConfig.minthrottle;
+        value = Math.trunc(value) + that.sysConfig.minthrottle;
         break;
       case FLIGHT_LOG_FIELD_PREDICTOR_MINMOTOR:
         /*
@@ -1453,7 +1453,7 @@ export function FlightLogParser(logData) {
          * save space for positive values). So we need to convert those very large unsigned values into their
          * corresponding 32-bit signed values.
          */
-        value = (value | 0) + (that.sysConfig.motorOutput[0] | 0); // motorOutput[0] is the min motor output
+        value = Math.trunc(value) + Math.trunc(that.sysConfig.motorOutput[0]); // motorOutput[0] is the min motor output
         break;
       case FLIGHT_LOG_FIELD_PREDICTOR_1500:
         value += 1500;
@@ -1673,13 +1673,13 @@ export function FlightLogParser(logData) {
         break;
       case FlightLogEvent.AUTOTUNE_TARGETS:
         //Convert the angles from decidegrees back to plain old degrees for ease of use
-        lastEvent.data.currentAngle = stream.readS16() / 10.0;
+        lastEvent.data.currentAngle = stream.readS16() / 10;
 
         lastEvent.data.targetAngle = stream.readS8();
         lastEvent.data.targetAngleAtPeak = stream.readS8();
 
-        lastEvent.data.firstPeakAngle = stream.readS16() / 10.0;
-        lastEvent.data.secondPeakAngle = stream.readS16() / 10.0;
+        lastEvent.data.firstPeakAngle = stream.readS16() / 10;
+        lastEvent.data.secondPeakAngle = stream.readS16() / 10;
         break;
       case FlightLogEvent.GTUNE_CYCLE_RESULT:
         lastEvent.data.axis = stream.readU8();
diff --git a/src/header_dialog.js b/src/header_dialog.js
index 4f24b4c2..d43bf9e9 100644
--- a/src/header_dialog.js
+++ b/src/header_dialog.js
@@ -539,6 +539,12 @@ export function HeaderDialog(dialog, onSave) {
       name: "gyro_to_use",
       type: FIRMWARE_TYPE_BETAFLIGHT,
       min: "4.3.0",
+      max: "4.5.9",
+    },
+    {
+      name: "gyro_enabled_bitmask",
+      type: FIRMWARE_TYPE_BETAFLIGHT,
+      min: "2025.12.0",
       max: "9999.9.9",
     },
     {
@@ -867,6 +873,34 @@ export function HeaderDialog(dialog, onSave) {
     } else {
       parameterElem.addClass("missing");
     }
+    parameterElem.css(
+      "display",
+      isParameterValid(name) ? "table-cell" : "none",
+    );
+  }
+
+  function setBitmaskParameter(name, data, totalBits = 8) {
+    let parameterElem = $(`.parameter td[name="${name}"]`);
+    let nameElem = $("input", parameterElem);
+    if (data == null) {
+      // Clear all bitmask state when data is null
+      nameElem.val(""); // Clear the input value
+      nameElem.removeData("raw-value"); // Remove stored raw value
+      nameElem.prop("readonly", false); // Make input editable again
+      parameterElem.removeAttr("title"); // Clear tooltip
+      parameterElem.addClass("missing");
+    } else {
+      // Convert number to binary string with leading zeros
+      const binaryString = data.toString(2).padStart(totalBits, '0');
+      // Display as "3 (00000011)" format
+      const displayValue = `${data} (${binaryString})`;
+      nameElem.val(displayValue);
+      // Store the raw integer value for round-trip saving
+      nameElem.data("raw-value", data);
+      nameElem.attr("readonly", true); // Make it readonly since it shows formatted bitmask
+      parameterElem.attr("title", `Bitmask value: ${data} (binary: ${binaryString})`);
+      parameterElem.removeClass("missing");
+    }
     parameterElem.css(
       "display",
       isParameterValid(name) ? "table-cell" : "none"
@@ -1363,9 +1397,9 @@ export function HeaderDialog(dialog, onSave) {
 
     let PID_CONTROLLER_TYPE = [];
     if (
-      (sysConfig.firmware >= 3.0 &&
+      (sysConfig.firmware >= 3 &&
         sysConfig.firmwareType == FIRMWARE_TYPE_BETAFLIGHT) ||
-      (sysConfig.firmware >= 2.0 &&
+      (sysConfig.firmware >= 2 &&
         sysConfig.firmwareType == FIRMWARE_TYPE_CLEANFLIGHT)
     ) {
       PID_CONTROLLER_TYPE = ["LEGACY", "BETAFLIGHT"];
@@ -1713,8 +1747,7 @@ export function HeaderDialog(dialog, onSave) {
       if (semver.lt(activeSysConfig.firmwareVersion, "2025.12.0")) {
         const derivativeColumn = document.getElementById("derivativeColumn");
         const dMaxColumn = document.getElementById("dMaxColumn");
-        const parent = derivativeColumn.parentNode;
-        parent.insertBefore(dMaxColumn, derivativeColumn); // Меняем местами
+        derivativeColumn.before(dMaxColumn); // Меняем местами
       }
     } else {
       $("#d_max").hide();
@@ -1938,6 +1971,7 @@ export function HeaderDialog(dialog, onSave) {
     renderSelect("baro_hardware", sysConfig.baro_hardware, BARO_HARDWARE);
     renderSelect("mag_hardware", sysConfig.mag_hardware, MAG_HARDWARE);
     renderSelect("gyro_to_use", sysConfig.gyro_to_use, GYRO_TO_USE);
+    setBitmaskParameter("gyro_enabled_bitmask", sysConfig.gyro_enabled_bitmask, 8);
     setParameter("motor_poles", sysConfig.motor_poles, 0);
 
     /* Booleans */
@@ -1998,6 +2032,9 @@ export function HeaderDialog(dialog, onSave) {
           if ($(this).attr("decPl") != null) {
             newArray[matches[2]] =
               parseFloat($(this).val()) * Math.pow(10, $(this).attr("decPl"));
+          } else if ($(this).data("raw-value") != null) {
+            // Use raw value for bitmask parameters
+            newArray[matches[2]] = $(this).data("raw-value");
           } else {
             newArray[matches[2]] = $(this).val() == "on" ? 1 : 0;
           }
@@ -2006,6 +2043,9 @@ export function HeaderDialog(dialog, onSave) {
           if ($(this).attr("decPl") != null) {
             newSysConfig[$(this).attr("name")] =
               parseFloat($(this).val()) * Math.pow(10, $(this).attr("decPl"));
+          } else if ($(this).data("raw-value") != null) {
+            // Use raw value for bitmask parameters
+            newSysConfig[$(this).attr("name")] = $(this).data("raw-value");
           } else {
             newSysConfig[$(this).attr("name")] = $(this).val() == "on" ? 1 : 0;
           }