diff --git a/mobile/android/app/checkstyle.xml b/mobile/android/app/checkstyle.xml
index 06b158e42695..80f7aff92c79 100644
--- a/mobile/android/app/checkstyle.xml
+++ b/mobile/android/app/checkstyle.xml
@@ -55,7 +55,7 @@
         </module>
         <module name="WhitespaceAround">
             <property name="tokens" value="ASSIGN, BAND, BAND_ASSIGN, BOR, BOR_ASSIGN, BSR, BSR_ASSIGN, BXOR, BXOR_ASSIGN,
-                    LITERAL_CATCH, LITERAL_DO, LITERAL_ELSE, LITERAL_FINALLY, LITERAL_FOR, LITERAL_IF, LITERAL_RETURN, LITERAL_SWITCH"/>
+                    LITERAL_CATCH, LITERAL_DO, LITERAL_ELSE, LITERAL_FINALLY, LITERAL_FOR, LITERAL_IF, LITERAL_RETURN, LITERAL_SWITCH, LITERAL_SYNCHRONIZED, LITERAL_TRY"/>
         </module>
     </module>
 
diff --git a/mobile/android/base/java/org/mozilla/gecko/GeckoAppShell.java b/mobile/android/base/java/org/mozilla/gecko/GeckoAppShell.java
index bc35b31a6bb4..071c03911fa7 100644
--- a/mobile/android/base/java/org/mozilla/gecko/GeckoAppShell.java
+++ b/mobile/android/base/java/org/mozilla/gecko/GeckoAppShell.java
@@ -1492,7 +1492,7 @@ public class GeckoAppShell
         List<ResolveInfo> plugins = pm.queryIntentServices(new Intent(PLUGIN_ACTION),
                 PackageManager.GET_SERVICES | PackageManager.GET_META_DATA);
 
-        synchronized(mPackageInfoCache) {
+        synchronized (mPackageInfoCache) {
 
             // clear the list of existing packageInfo objects
             mPackageInfoCache.clear();
@@ -1619,7 +1619,7 @@ public class GeckoAppShell
             return null;
         }
 
-        synchronized(mPackageInfoCache) {
+        synchronized (mPackageInfoCache) {
             for (PackageInfo pkgInfo : mPackageInfoCache) {
                 if (pluginLib.contains(pkgInfo.packageName)) {
                     return pkgInfo.packageName;
diff --git a/mobile/android/base/java/org/mozilla/gecko/GeckoEditable.java b/mobile/android/base/java/org/mozilla/gecko/GeckoEditable.java
index f5bedaed4dfd..f1f4229a3b1f 100644
--- a/mobile/android/base/java/org/mozilla/gecko/GeckoEditable.java
+++ b/mobile/android/base/java/org/mozilla/gecko/GeckoEditable.java
@@ -253,7 +253,7 @@ final class GeckoEditable extends JNIObject
             if (mActions.isEmpty()) {
                 mActionsActive.acquireUninterruptibly();
                 mActions.offer(action);
-            } else synchronized(this) {
+            } else synchronized (this) {
                 // tryAcquire here in case Gecko thread has just released it
                 mActionsActive.tryAcquire();
                 mActions.offer(action);
@@ -350,7 +350,7 @@ final class GeckoEditable extends JNIObject
                 throw new IllegalStateException("empty actions queue");
             }
 
-            synchronized(this) {
+            synchronized (this) {
                 if (mActions.isEmpty()) {
                     mActionsActive.release();
                 }
diff --git a/mobile/android/base/java/org/mozilla/gecko/Tab.java b/mobile/android/base/java/org/mozilla/gecko/Tab.java
index 17e50cca1fa3..3fb76fa1793e 100644
--- a/mobile/android/base/java/org/mozilla/gecko/Tab.java
+++ b/mobile/android/base/java/org/mozilla/gecko/Tab.java
@@ -763,25 +763,25 @@ public class Tab {
     }
 
     public void addPluginLayer(Object surfaceOrView, Layer layer) {
-        synchronized(mPluginLayers) {
+        synchronized (mPluginLayers) {
             mPluginLayers.put(surfaceOrView, layer);
         }
     }
 
     public Layer getPluginLayer(Object surfaceOrView) {
-        synchronized(mPluginLayers) {
+        synchronized (mPluginLayers) {
             return mPluginLayers.get(surfaceOrView);
         }
     }
 
     public Collection<Layer> getPluginLayers() {
-        synchronized(mPluginLayers) {
+        synchronized (mPluginLayers) {
             return new ArrayList<Layer>(mPluginLayers.values());
         }
     }
 
     public Layer removePluginLayer(Object surfaceOrView) {
-        synchronized(mPluginLayers) {
+        synchronized (mPluginLayers) {
             return mPluginLayers.remove(surfaceOrView);
         }
     }
diff --git a/mobile/android/base/java/org/mozilla/gecko/favicons/Favicons.java b/mobile/android/base/java/org/mozilla/gecko/favicons/Favicons.java
index 406ee42b5e8e..b0238345026e 100644
--- a/mobile/android/base/java/org/mozilla/gecko/favicons/Favicons.java
+++ b/mobile/android/base/java/org/mozilla/gecko/favicons/Favicons.java
@@ -296,7 +296,7 @@ public class Favicons {
         final LoadFaviconTask task =
             new LoadFaviconTask(context, pageURL, targetURL, 0, callback, targetSize, true);
         final int taskId = task.getId();
-        synchronized(loadTasks) {
+        synchronized (loadTasks) {
             loadTasks.put(taskId, task);
         }
         task.execute();
@@ -369,7 +369,7 @@ public class Favicons {
         final LoadFaviconTask task =
             new LoadFaviconTask(context, pageURL, faviconURL, flags, listener, targetSize, false);
         final int taskId = task.getId();
-        synchronized(loadTasks) {
+        synchronized (loadTasks) {
             loadTasks.put(taskId, task);
         }
         task.execute();
@@ -567,7 +567,7 @@ public class Favicons {
     }
 
     public static void removeLoadTask(int taskId) {
-        synchronized(loadTasks) {
+        synchronized (loadTasks) {
             loadTasks.delete(taskId);
         }
     }
diff --git a/mobile/android/base/java/org/mozilla/gecko/favicons/LoadFaviconTask.java b/mobile/android/base/java/org/mozilla/gecko/favicons/LoadFaviconTask.java
index ecf2b715d9f4..7c75a4848a27 100644
--- a/mobile/android/base/java/org/mozilla/gecko/favicons/LoadFaviconTask.java
+++ b/mobile/android/base/java/org/mozilla/gecko/favicons/LoadFaviconTask.java
@@ -381,7 +381,7 @@ public class LoadFaviconTask {
         Bitmap image;
         // Determine if there is already an ongoing task to fetch the Favicon we desire.
         // If there is, just join the queue and wait for it to finish. If not, we carry on.
-        synchronized(loadsInFlight) {
+        synchronized (loadsInFlight) {
             // Another load of the current Favicon is already underway
             LoadFaviconTask existingTask = loadsInFlight.get(faviconURL);
             if (existingTask != null && !existingTask.isCancelled()) {
@@ -565,7 +565,7 @@ public class LoadFaviconTask {
     void onCancelled() {
         Favicons.removeLoadTask(id);
 
-        synchronized(loadsInFlight) {
+        synchronized (loadsInFlight) {
             // Only remove from the hashmap if the task there is the one that's being canceled.
             // Cancellation of a task that would have chained is not interesting to the hashmap.
             final LoadFaviconTask primary = loadsInFlight.get(faviconURL);
diff --git a/mobile/android/base/java/org/mozilla/gecko/favicons/cache/FaviconCache.java b/mobile/android/base/java/org/mozilla/gecko/favicons/cache/FaviconCache.java
index 0276b462be65..664f8b2f3267 100644
--- a/mobile/android/base/java/org/mozilla/gecko/favicons/cache/FaviconCache.java
+++ b/mobile/android/base/java/org/mozilla/gecko/favicons/cache/FaviconCache.java
@@ -451,7 +451,7 @@ public class FaviconCache {
      * @return true if this element already existed in the list, false otherwise. (Useful for preventing multiple-insertion.)
      */
     private boolean setMostRecentlyUsedWithinRead(FaviconCacheElement element) {
-        synchronized(reorderingLock) {
+        synchronized (reorderingLock) {
             boolean contained = ordering.remove(element);
             ordering.offer(element);
             return contained;
diff --git a/mobile/android/base/java/org/mozilla/gecko/home/HomePanelsManager.java b/mobile/android/base/java/org/mozilla/gecko/home/HomePanelsManager.java
index afeef48e16a3..a1b3b4dcd89c 100644
--- a/mobile/android/base/java/org/mozilla/gecko/home/HomePanelsManager.java
+++ b/mobile/android/base/java/org/mozilla/gecko/home/HomePanelsManager.java
@@ -326,7 +326,7 @@ public class HomePanelsManager implements GeckoEventListener {
         pm.requestPanelsById(ids, new RequestCallback() {
             @Override
             public void onComplete(List<PanelInfo> panelInfos) {
-                synchronized(panelRequestLock) {
+                synchronized (panelRequestLock) {
                     latestPanelInfos.addAll(panelInfos);
                     Log.d(LOGTAG, "executeRefresh: fetched panel infos: " + panelInfos.size());
 
@@ -336,7 +336,7 @@ public class HomePanelsManager implements GeckoEventListener {
         });
 
         try {
-            synchronized(panelRequestLock) {
+            synchronized (panelRequestLock) {
                 panelRequestLock.wait(PANEL_INFO_TIMEOUT_MSEC);
 
                 Log.d(LOGTAG, "executeRefresh: done fetching panel infos");
diff --git a/mobile/android/base/java/org/mozilla/gecko/home/PanelInfoManager.java b/mobile/android/base/java/org/mozilla/gecko/home/PanelInfoManager.java
index 6908c794bdc3..10db65ea1a30 100644
--- a/mobile/android/base/java/org/mozilla/gecko/home/PanelInfoManager.java
+++ b/mobile/android/base/java/org/mozilla/gecko/home/PanelInfoManager.java
@@ -75,7 +75,7 @@ public class PanelInfoManager implements GeckoEventListener {
     public void requestPanelsById(Set<String> ids, RequestCallback callback) {
         final int requestId = sRequestId.getAndIncrement();
 
-        synchronized(sCallbacks) {
+        synchronized (sCallbacks) {
             // If there are no pending callbacks, register the event listener.
             if (sCallbacks.size() == 0) {
                 EventDispatcher.getInstance().registerGeckoThreadListener(this,
@@ -131,7 +131,7 @@ public class PanelInfoManager implements GeckoEventListener {
             final RequestCallback callback;
             final int requestId = message.getInt("requestId");
 
-            synchronized(sCallbacks) {
+            synchronized (sCallbacks) {
                 callback = sCallbacks.get(requestId);
                 sCallbacks.delete(requestId);
 
diff --git a/mobile/android/base/java/org/mozilla/gecko/javaaddons/JavaAddonManagerV1.java b/mobile/android/base/java/org/mozilla/gecko/javaaddons/JavaAddonManagerV1.java
index 2e8d6d92e630..f361773ca5de 100644
--- a/mobile/android/base/java/org/mozilla/gecko/javaaddons/JavaAddonManagerV1.java
+++ b/mobile/android/base/java/org/mozilla/gecko/javaaddons/JavaAddonManagerV1.java
@@ -39,7 +39,7 @@ public class JavaAddonManagerV1 implements NativeEventListener {
 
     private final org.mozilla.gecko.EventDispatcher mDispatcher;
 
-    // Protected by synchronized(this).
+    // Protected by synchronized (this).
     private final Map<String, EventDispatcherImpl> mGUIDToDispatcherMap = new HashMap<>();
 
     public static synchronized JavaAddonManagerV1 getInstance() {
@@ -153,7 +153,7 @@ public class JavaAddonManagerV1 implements NativeEventListener {
         private final String guid;
         private final String dexFileName;
 
-        // Protected by synchronized(this).
+        // Protected by synchronized (this).
         private final Map<JavaAddonInterfaceV1.EventListener, Pair<NativeEventListener, String[]>> mListenerToWrapperMap = new IdentityHashMap<>();
 
         public EventDispatcherImpl(String guid, String dexFileName) {