diff --git a/mobile/android/base/CrashReporter.java b/mobile/android/base/CrashReporter.java
index 10c01ef76d8..8c8c97ef8e5 100644
--- a/mobile/android/base/CrashReporter.java
+++ b/mobile/android/base/CrashReporter.java
@@ -282,8 +282,8 @@ public class CrashReporter extends Activity
 
     private String generateBoundary() {
         // Generate some random numbers to fill out the boundary
-        int r0 = (int)((double)Integer.MAX_VALUE * Math.random());
-        int r1 = (int)((double)Integer.MAX_VALUE * Math.random());
+        int r0 = (int)(Integer.MAX_VALUE * Math.random());
+        int r1 = (int)(Integer.MAX_VALUE * Math.random());
         return String.format("---------------------------%08X%08X", r0, r1);
     }
 
diff --git a/mobile/android/base/GeckoApp.java b/mobile/android/base/GeckoApp.java
index d765687675a..188129ffe1d 100644
--- a/mobile/android/base/GeckoApp.java
+++ b/mobile/android/base/GeckoApp.java
@@ -1016,9 +1016,9 @@ public abstract class GeckoApp
         int inSampleSize = 1;
         if (height > idealHeight || width > idealWidth) {
             if (width > height) {
-                inSampleSize = Math.round((float)height / (float)idealHeight);
+                inSampleSize = Math.round((float)height / idealHeight);
             } else {
-                inSampleSize = Math.round((float)width / (float)idealWidth);
+                inSampleSize = Math.round((float)width / idealWidth);
             }
         }
         return inSampleSize;
diff --git a/mobile/android/base/GeckoBatteryManager.java b/mobile/android/base/GeckoBatteryManager.java
index 303ee0fb983..97f4715a8ab 100644
--- a/mobile/android/base/GeckoBatteryManager.java
+++ b/mobile/android/base/GeckoBatteryManager.java
@@ -107,8 +107,8 @@ public class GeckoBatteryManager extends BroadcastReceiver {
             }
 
             // We need two doubles because sLevel is a double.
-            double current =  (double)intent.getIntExtra(BatteryManager.EXTRA_LEVEL, -1);
-            double max = (double)intent.getIntExtra(BatteryManager.EXTRA_SCALE, -1);
+            double current = intent.getIntExtra(BatteryManager.EXTRA_LEVEL, -1);
+            double max = intent.getIntExtra(BatteryManager.EXTRA_SCALE, -1);
             if (current == -1 || max == -1) {
                 Log.e(LOGTAG, "Failed to get battery level!");
                 sLevel = kDefaultLevel;
diff --git a/mobile/android/base/GeckoJavaSampler.java b/mobile/android/base/GeckoJavaSampler.java
index f8bde6f4b41..9c133d7bc54 100644
--- a/mobile/android/base/GeckoJavaSampler.java
+++ b/mobile/android/base/GeckoJavaSampler.java
@@ -142,7 +142,7 @@ public class GeckoJavaSampler {
         Sample sample = getSample(aThreadId, aSampleId);
         if (sample != null) {
             if (sample.mJavaTime != 0) {
-                return (double)(sample.mJavaTime -
+                return (sample.mJavaTime -
                     SystemClock.elapsedRealtime()) + getProfilerTime();
             }
             System.out.println("Sample: " + sample.mTime);
diff --git a/mobile/android/base/animation/PropertyAnimator.java b/mobile/android/base/animation/PropertyAnimator.java
index 000bae5ac75..8e82fd161d7 100644
--- a/mobile/android/base/animation/PropertyAnimator.java
+++ b/mobile/android/base/animation/PropertyAnimator.java
@@ -61,7 +61,7 @@ public class PropertyAnimator implements Runnable {
 
     public PropertyAnimator(long duration, Interpolator interpolator) {
         mDuration = duration;
-        mDurationReciprocal = 1.0f / (float) mDuration;
+        mDurationReciprocal = 1.0f / mDuration;
         mInterpolator = interpolator;
         mElementsList = new ArrayList<ElementHolder>();
         mFramePoster = FramePoster.create(this);
diff --git a/mobile/android/base/favicons/decoders/ICODecoder.java b/mobile/android/base/favicons/decoders/ICODecoder.java
index 18078b95439..1c3f6720696 100644
--- a/mobile/android/base/favicons/decoders/ICODecoder.java
+++ b/mobile/android/base/favicons/decoders/ICODecoder.java
@@ -293,10 +293,10 @@ public class ICODecoder implements Iterable<Bitmap> {
         System.arraycopy(decodand, offset + iconDirEntry.payloadOffset, decodeTarget, singlePayloadOffset, iconDirEntry.payloadSize);
 
         // Update the offset field of the ICONDIRENTRY to make the new ICO valid.
-        decodeTarget[ICO_HEADER_LENGTH_BYTES + 12] = (byte) singlePayloadOffset;
-        decodeTarget[ICO_HEADER_LENGTH_BYTES + 13] = (byte) (singlePayloadOffset >>> 8);
-        decodeTarget[ICO_HEADER_LENGTH_BYTES + 14] = (byte) (singlePayloadOffset >>> 16);
-        decodeTarget[ICO_HEADER_LENGTH_BYTES + 15] = (byte) (singlePayloadOffset >>> 24);
+        decodeTarget[ICO_HEADER_LENGTH_BYTES + 12] = singlePayloadOffset;
+        decodeTarget[ICO_HEADER_LENGTH_BYTES + 13] = (singlePayloadOffset >>> 8);
+        decodeTarget[ICO_HEADER_LENGTH_BYTES + 14] = (singlePayloadOffset >>> 16);
+        decodeTarget[ICO_HEADER_LENGTH_BYTES + 15] = (singlePayloadOffset >>> 24);
 
         // Decode the newly-constructed singleton-ICO.
         return BitmapUtils.decodeByteArray(decodeTarget);
diff --git a/mobile/android/base/gfx/Axis.java b/mobile/android/base/gfx/Axis.java
index 500e7811458..e0c6469d377 100644
--- a/mobile/android/base/gfx/Axis.java
+++ b/mobile/android/base/gfx/Axis.java
@@ -53,7 +53,7 @@ abstract class Axis {
 
     private static float getFloatPref(Map<String, Integer> prefs, String prefName, int defaultValue) {
         Integer value = (prefs == null ? null : prefs.get(prefName));
-        return (float)(value == null || value < 0 ? defaultValue : value) / 1000f;
+        return (value == null || value < 0 ? defaultValue : value) / 1000f;
     }
 
     private static int getIntPref(Map<String, Integer> prefs, String prefName, int defaultValue) {
diff --git a/mobile/android/base/gfx/DisplayPortCalculator.java b/mobile/android/base/gfx/DisplayPortCalculator.java
index a977694114b..a46ed5cf37d 100644
--- a/mobile/android/base/gfx/DisplayPortCalculator.java
+++ b/mobile/android/base/gfx/DisplayPortCalculator.java
@@ -124,7 +124,7 @@ final class DisplayPortCalculator {
 
     private static float getFloatPref(Map<String, Integer> prefs, String prefName, int defaultValue) {
         Integer value = (prefs == null ? null : prefs.get(prefName));
-        return (float)(value == null || value < 0 ? defaultValue : value) / 1000f;
+        return (value == null || value < 0 ? defaultValue : value) / 1000f;
     }
 
     private static abstract class DisplayPortStrategy {
@@ -746,7 +746,7 @@ final class DisplayPortCalculator {
         @Override
         public boolean drawTimeUpdate(long millis, int pixels) {
             // calculate the number of frames it took to draw a viewport-sized area
-            float normalizedTime = (float)mPixelArea * (float)millis / (float)pixels;
+            float normalizedTime = (float)mPixelArea * millis / pixels;
             int normalizedFrames = (int)FloatMath.ceil(normalizedTime * 60f / 1000f);
             // broaden our range on how long it takes to draw if the draw falls outside
             // the range. this allows it to grow gradually. this heuristic may need to
diff --git a/mobile/android/base/gfx/JavaPanZoomController.java b/mobile/android/base/gfx/JavaPanZoomController.java
index a9de6a1d0ff..5fcc82e727f 100644
--- a/mobile/android/base/gfx/JavaPanZoomController.java
+++ b/mobile/android/base/gfx/JavaPanZoomController.java
@@ -170,7 +170,7 @@ class JavaPanZoomController
 
             @Override public void prefValue(String pref, int value) {
                 if (pref.equals("ui.scrolling.gamepad_dead_zone")) {
-                    GamepadUtils.overrideDeadZoneThreshold((float)value / 1000f);
+                    GamepadUtils.overrideDeadZoneThreshold(value / 1000f);
                 }
             }
 
@@ -660,7 +660,7 @@ class JavaPanZoomController
     }
 
     private void track(float x, float y, long time) {
-        float timeDelta = (float)(time - mLastEventTime);
+        float timeDelta = (time - mLastEventTime);
         if (FloatUtils.fuzzyEquals(timeDelta, 0)) {
             // probably a duplicate event, ignore it. using a zero timeDelta will mess
             // up our velocity
diff --git a/mobile/android/base/gfx/LayerMarginsAnimator.java b/mobile/android/base/gfx/LayerMarginsAnimator.java
index 4ff88b638a6..6d0321fb3b3 100644
--- a/mobile/android/base/gfx/LayerMarginsAnimator.java
+++ b/mobile/android/base/gfx/LayerMarginsAnimator.java
@@ -61,7 +61,7 @@ public class LayerMarginsAnimator {
         mPrefObserverId = PrefsHelper.getPref(PREF_SHOW_MARGINS_THRESHOLD, new PrefsHelper.PrefHandlerBase() {
             @Override
             public void prefValue(String pref, int value) {
-                SHOW_MARGINS_THRESHOLD = (float)value / 100.0f;
+                SHOW_MARGINS_THRESHOLD = value / 100.0f;
             }
 
             @Override
diff --git a/mobile/android/base/gfx/PluginLayer.java b/mobile/android/base/gfx/PluginLayer.java
index 843465d86af..2923072fae8 100644
--- a/mobile/android/base/gfx/PluginLayer.java
+++ b/mobile/android/base/gfx/PluginLayer.java
@@ -136,10 +136,10 @@ public class PluginLayer extends TileLayer {
         private void clampToMaxSize() {
             if (width > mMaxDimension || height > mMaxDimension) {
                 if (width > height) {
-                    height = Math.round(((float)height/(float)width) * mMaxDimension);
+                    height = Math.round(((float)height/ width) * mMaxDimension);
                     width = mMaxDimension;
                 } else {
-                    width = Math.round(((float)width/(float)height) * mMaxDimension);
+                    width = Math.round(((float)width/ height) * mMaxDimension);
                     height = mMaxDimension;
                 }
             }
diff --git a/mobile/android/base/sync/SharedPreferencesClientsDataDelegate.java b/mobile/android/base/sync/SharedPreferencesClientsDataDelegate.java
index da825ebc18a..5abdd67f6f4 100644
--- a/mobile/android/base/sync/SharedPreferencesClientsDataDelegate.java
+++ b/mobile/android/base/sync/SharedPreferencesClientsDataDelegate.java
@@ -75,7 +75,7 @@ public class SharedPreferencesClientsDataDelegate implements ClientsDataDelegate
 
   @Override
   public synchronized void setClientsCount(int clientsCount) {
-    sharedPreferences.edit().putLong(SyncConfiguration.PREF_NUM_CLIENTS, (long) clientsCount).commit();
+    sharedPreferences.edit().putLong(SyncConfiguration.PREF_NUM_CLIENTS, clientsCount).commit();
   }
 
   @Override
diff --git a/mobile/android/base/sync/Utils.java b/mobile/android/base/sync/Utils.java
index e6de63d6ddd..94f722ce23a 100644
--- a/mobile/android/base/sync/Utils.java
+++ b/mobile/android/base/sync/Utils.java
@@ -200,7 +200,7 @@ public class Utils {
   }
 
   public static long decimalSecondsToMilliseconds(Integer decimal) {
-    return (long)(decimal * 1000);
+    return (decimal * 1000);
   }
 
   public static byte[] sha256(byte[] in)
diff --git a/mobile/android/base/sync/crypto/HKDF.java b/mobile/android/base/sync/crypto/HKDF.java
index a12efbeb616..16c0d8147da 100644
--- a/mobile/android/base/sync/crypto/HKDF.java
+++ b/mobile/android/base/sync/crypto/HKDF.java
@@ -56,7 +56,7 @@ public class HKDF {
     byte[] T  = {};
     byte[] Tn = {};
 
-    int iterations = (int) Math.ceil(((double)len) / ((double)BLOCKSIZE));
+    int iterations = (int) Math.ceil(((double)len) / (BLOCKSIZE));
     for (int i = 0; i < iterations; i++) {
       Tn = digestBytes(Utils.concatAll(Tn, info, Utils.hex2Byte(Integer.toHexString(i + 1))),
                        hmacHasher);
diff --git a/mobile/android/base/sync/syncadapter/SyncAdapter.java b/mobile/android/base/sync/syncadapter/SyncAdapter.java
index 4e88bb7c56e..7e7b36e63b9 100644
--- a/mobile/android/base/sync/syncadapter/SyncAdapter.java
+++ b/mobile/android/base/sync/syncadapter/SyncAdapter.java
@@ -198,7 +198,7 @@ public class SyncAdapter extends AbstractThreadedSyncAdapter implements BaseGlob
     }
     if (backoff > 0) {
       // Fuzz the backoff time (up to 25% more) to prevent client lock-stepping; agrees with desktop.
-      final long fuzzedBackoff = backoff + Math.round((double) backoff * 0.25d * Math.random());
+      final long fuzzedBackoff = backoff + Math.round(backoff * 0.25d * Math.random());
       this.backoffHandler.extendEarliestNextRequest(System.currentTimeMillis() + fuzzedBackoff);
     }
   }
diff --git a/mobile/android/base/tests/MotionEventReplayer.java b/mobile/android/base/tests/MotionEventReplayer.java
index db7c4d88020..ba29e65b7e2 100644
--- a/mobile/android/base/tests/MotionEventReplayer.java
+++ b/mobile/android/base/tests/MotionEventReplayer.java
@@ -76,11 +76,11 @@ class MotionEventReplayer {
     }
 
     private float scaleX(float value) {
-        return value * (float)mSurfaceWidth / (float)CAPTURE_WINDOW_WIDTH;
+        return value * mSurfaceWidth / CAPTURE_WINDOW_WIDTH;
     }
 
     private float scaleY(float value) {
-        return value * (float)mSurfaceHeight / (float)CAPTURE_WINDOW_HEIGHT;
+        return value * mSurfaceHeight / CAPTURE_WINDOW_HEIGHT;
     }
 
     public void replayEvents(InputStream eventDescriptions)
diff --git a/mobile/android/base/widget/FadedTextView.java b/mobile/android/base/widget/FadedTextView.java
index 38f2f05b29a..f0f2b762025 100644
--- a/mobile/android/base/widget/FadedTextView.java
+++ b/mobile/android/base/widget/FadedTextView.java
@@ -87,7 +87,7 @@ public class FadedTextView extends ThemedTextView {
         public FadedTextGradient(int width, int fadeWidth, int color) {
             super(0, 0, width, 0,
                   new int[] { color, color, 0x0 },
-                  new float[] { 0,  ((float) (width - fadeWidth) / (float) width), 1.0f },
+                  new float[] { 0,  ((float) (width - fadeWidth) / width), 1.0f },
                   Shader.TileMode.CLAMP);
 
             mWidth = width;