6 files changed, 8 insertions, 8 deletions
diff --git a/services/fxaccounts/FxAccountsProfileClient.jsm b/services/fxaccounts/FxAccountsProfileClient.jsm
index 37115a3fab..1e5edc634c 100644
--- a/services/fxaccounts/FxAccountsProfileClient.jsm
+++ b/services/fxaccounts/FxAccountsProfileClient.jsm
@@ -89,7 +89,7 @@ this.FxAccountsProfileClient.prototype = {
     try {
       return (yield this._rawRequest(path, method, token));
     } catch (ex) {
-      if (!ex instanceof FxAccountsProfileClientError || ex.code != 401) {
+      if (!(ex instanceof FxAccountsProfileClientError) || ex.code != 401) {
         throw ex;
       }
       // If this object was instantiated with a token then we don't refresh it.
@@ -105,7 +105,7 @@ this.FxAccountsProfileClient.prototype = {
       try {
         return (yield this._rawRequest(path, method, token));
       } catch (ex) {
-        if (!ex instanceof FxAccountsProfileClientError || ex.code != 401) {
+        if (!(ex instanceof FxAccountsProfileClientError) || ex.code != 401) {
           throw ex;
         }
         log.info("Retry fetching the profile still returned a 401 - revoking our token and failing");
diff --git a/services/fxaccounts/FxAccountsStorage.jsm b/services/fxaccounts/FxAccountsStorage.jsm
index 021763b92e..43e2d21a0c 100644
--- a/services/fxaccounts/FxAccountsStorage.jsm
+++ b/services/fxaccounts/FxAccountsStorage.jsm
@@ -403,7 +403,7 @@ this.FxAccountsStorageManager.prototype = {
     try {
       yield this.secureStorage.set(this.cachedPlain.uid, toWriteSecure);
     } catch (ex) {
-      if (!ex instanceof this.secureStorage.STORAGE_LOCKED) {
+      if (!(ex instanceof this.secureStorage.STORAGE_LOCKED)) {
         throw ex;
       }
       // This shouldn't be possible as once it is unlocked it can't be
diff --git a/services/sync/modules/record.js b/services/sync/modules/record.js
index 02f7f281a1..f7a69d9ef1 100644
--- a/services/sync/modules/record.js
+++ b/services/sync/modules/record.js
@@ -43,7 +43,7 @@ WBORecord.prototype = {
   // Get thyself from your URI, then deserialize.
   // Set thine 'response' field.
   fetch: function fetch(resource) {
-    if (!resource instanceof Resource) {
+    if (!(resource instanceof Resource)) {
       throw new Error("First argument must be a Resource instance.");
     }
 
@@ -56,7 +56,7 @@ WBORecord.prototype = {
   },
 
   upload: function upload(resource) {
-    if (!resource instanceof Resource) {
+    if (!(resource instanceof Resource)) {
       throw new Error("First argument must be a Resource instance.");
     }
 
diff --git a/services/sync/modules/service.js b/services/sync/modules/service.js
index b0eb0f41d6..5c91323b51 100644
--- a/services/sync/modules/service.js
+++ b/services/sync/modules/service.js
@@ -455,7 +455,7 @@ Sync11Service.prototype = {
     this.clientsEngine = new ClientEngine(this);
 
     for (let name of engines) {
-      if (!name in ENGINE_MODULES) {
+      if (!(name in ENGINE_MODULES)) {
         this._log.info("Do not know about engine: " + name);
         continue;
       }
diff --git a/services/sync/tps/extensions/mozmill/resource/driver/controller.js b/services/sync/tps/extensions/mozmill/resource/driver/controller.js
index a378ce51fb..8d66a41aef 100644
--- a/services/sync/tps/extensions/mozmill/resource/driver/controller.js
+++ b/services/sync/tps/extensions/mozmill/resource/driver/controller.js
@@ -978,7 +978,7 @@ function browserAdditions (controller) {
       }, "Timeout", timeout, aInterval);
     }
     catch (ex) {
-      if (!ex instanceof errors.TimeoutError) {
+      if (!(ex instanceof errors.TimeoutError)) {
         throw ex;
       }
       timed_out = true;
diff --git a/services/sync/tps/extensions/mozmill/resource/modules/assertions.js b/services/sync/tps/extensions/mozmill/resource/modules/assertions.js
index c9991acf06..c76f957470 100644
--- a/services/sync/tps/extensions/mozmill/resource/modules/assertions.js
+++ b/services/sync/tps/extensions/mozmill/resource/modules/assertions.js
@@ -659,7 +659,7 @@ Expect.prototype.waitFor = function Expect_waitFor(aCallback, aMessage, aTimeout
     Assert.prototype.waitFor.apply(this, arguments);
   }
   catch (ex) {
-    if (!ex instanceof errors.AssertionError) {
+    if (!(ex instanceof errors.AssertionError)) {
       throw ex;
     }
     message = ex.message;