diff --git a/b2g/confvars.sh b/b2g/confvars.sh
old mode 100644
new mode 100755
index d5924b125ac5..5d982d32f4f2
--- a/b2g/confvars.sh
+++ b/b2g/confvars.sh
@@ -38,7 +38,7 @@
 MOZ_APP_BASENAME=B2G
 MOZ_APP_VENDOR=Mozilla
 
-MOZ_APP_VERSION=14.0a1
+MOZ_APP_VERSION=15.0a1
 MOZ_APP_UA_NAME=Firefox
 
 MOZ_BRANDING_DIRECTORY=b2g/branding/unofficial
diff --git a/browser/config/version.txt b/browser/config/version.txt
index 644225a35f36..22be2c6c80a5 100644
--- a/browser/config/version.txt
+++ b/browser/config/version.txt
@@ -1 +1 @@
-14.0a1
+15.0a1
diff --git a/config/milestone.txt b/config/milestone.txt
index 17f7a63fad30..f3e48d9548fb 100644
--- a/config/milestone.txt
+++ b/config/milestone.txt
@@ -10,4 +10,4 @@
 # hardcoded milestones in the tree from these two files.
 #--------------------------------------------------------
 
-14.0a1
+15.0a1
diff --git a/js/src/config/milestone.txt b/js/src/config/milestone.txt
index 17f7a63fad30..f3e48d9548fb 100644
--- a/js/src/config/milestone.txt
+++ b/js/src/config/milestone.txt
@@ -10,4 +10,4 @@
 # hardcoded milestones in the tree from these two files.
 #--------------------------------------------------------
 
-14.0a1
+15.0a1
diff --git a/mobile/android/confvars.sh b/mobile/android/confvars.sh
old mode 100644
new mode 100755
index 0709cf005d98..9581f6516f8b
--- a/mobile/android/confvars.sh
+++ b/mobile/android/confvars.sh
@@ -38,7 +38,7 @@
 MOZ_APP_BASENAME=Fennec
 MOZ_APP_VENDOR=Mozilla
 
-MOZ_APP_VERSION=14.0a1
+MOZ_APP_VERSION=15.0a1
 MOZ_APP_UA_NAME=Firefox
 
 MOZ_BRANDING_DIRECTORY=mobile/android/branding/unofficial
diff --git a/mobile/xul/confvars.sh b/mobile/xul/confvars.sh
old mode 100644
new mode 100755
index 84034c69d0ab..8a3d460e4d76
--- a/mobile/xul/confvars.sh
+++ b/mobile/xul/confvars.sh
@@ -38,7 +38,7 @@
 MOZ_APP_BASENAME=Fennec
 MOZ_APP_VENDOR=Mozilla
 
-MOZ_APP_VERSION=14.0a1
+MOZ_APP_VERSION=15.0a1
 
 MOZ_BRANDING_DIRECTORY=mobile/xul/branding/unofficial
 MOZ_OFFICIAL_BRANDING_DIRECTORY=mobile/xul/branding/official
diff --git a/xpcom/components/Module.h b/xpcom/components/Module.h
index 091294f2039c..098d54b7c44f 100644
--- a/xpcom/components/Module.h
+++ b/xpcom/components/Module.h
@@ -53,7 +53,7 @@ namespace mozilla {
  */
 struct Module
 {
-  static const unsigned int kVersion = 14;
+  static const unsigned int kVersion = 15;
 
   struct CIDEntry;