diff --git a/browser/config/tooltool-manifests/linux32/asan.manifest b/browser/config/tooltool-manifests/linux32/asan.manifest
new file mode 100644
index 00000000000..8ce74c6e79c
--- /dev/null
+++ b/browser/config/tooltool-manifests/linux32/asan.manifest
@@ -0,0 +1,17 @@
+[
+{
+"clang_version": "r170890"
+}, 
+{
+"filename": "setup.sh", 
+"algorithm": "sha512", 
+"digest": "2005a41fe97a5e00997063705f39d42b6a43b1cf7ba306cbc7b1513de34cdcd050fc6326efa2107f19ba0cc67914745dbf13154fa748010a93cf072481ef4aaa", 
+"size": 47
+}, 
+{
+"filename": "clang.tar.bz2", 
+"algorithm": "sha512", 
+"digest": "0bcfc19f05cc0f042befb3823c7ecce9ba411b152921aa29e97e7adc846e0258fd7da521b1620cb1e61a19d2fcac9b60e6d613c922b6c153e01b9b0766651d09", 
+"size": 62708281
+}
+]
diff --git a/browser/config/tooltool-manifests/linux64/asan.manifest b/browser/config/tooltool-manifests/linux64/asan.manifest
new file mode 100644
index 00000000000..39ba5590465
--- /dev/null
+++ b/browser/config/tooltool-manifests/linux64/asan.manifest
@@ -0,0 +1,17 @@
+[
+{
+"clang_version": "r170890"
+},
+{
+"filename": "setup.sh",
+"algorithm": "sha512",
+"digest": "2005a41fe97a5e00997063705f39d42b6a43b1cf7ba306cbc7b1513de34cdcd050fc6326efa2107f19ba0cc67914745dbf13154fa748010a93cf072481ef4aaa",
+"size": 47
+},
+{
+"filename": "clang.tar.bz2",
+"algorithm": "sha512",
+"digest": "e14ccefd965372a57c540647b2b99e21a4aa82f81a8b9a9e18dac7cba4c3436181bef0dfab8c51bcb5c343f504a693fdcfbe7d609f10291b5dd65ab059979d29",
+"size": 63034761
+}
+]
diff --git a/browser/config/tooltool-manifests/macosx64/asan.manifest b/browser/config/tooltool-manifests/macosx64/asan.manifest
new file mode 100644
index 00000000000..ede87d30e76
--- /dev/null
+++ b/browser/config/tooltool-manifests/macosx64/asan.manifest
@@ -0,0 +1,17 @@
+[
+{
+"clang_version": "r170890"
+},
+{
+"size": 47,
+"digest": "2005a41fe97a5e00997063705f39d42b6a43b1cf7ba306cbc7b1513de34cdcd050fc6326efa2107f19ba0cc67914745dbf13154fa748010a93cf072481ef4aaa",
+"algorithm": "sha512",
+"filename": "setup.sh"
+},
+{
+"size": 56126352,
+"digest": "e156e2a39abd5bf272ee30748a6825f22ddd27565b097c66662a2a6f2e9892bc5b4bf30a3552dffbe867dbfc39e7ee086e0b2cd7935f6ea216c0cf936178a88f",
+"algorithm": "sha512",
+"filename": "clang.tar.bz2"
+}
+]