diff --git a/Makefile b/Makefile
index f732b677a..1a881a8d1 100644
--- a/Makefile
+++ b/Makefile
@@ -14,6 +14,8 @@ UNIT-TEST-DIR = $(TEST-DIR)/unit
 
 EXPORT-FILE = $(JS-SRC-DIR)/export.js
 
+PREAMBLE = "// Fine Uploader $(VERSION) - (c) 2013-present Widen Enterprises, Inc. MIT licensed. http://fineuploader.com"
+
 CRYPTOJS-FILES = \
 	$(JS-3RDPARTY-SRC-DIR)/crypto-js/core.js \
 	$(JS-3RDPARTY-SRC-DIR)/crypto-js/enc-base64.js \
@@ -215,112 +217,112 @@ _build:
 	$(NPM-BIN)/cleancss --source-map $@/fine-uploader-new.css -o $@/fine-uploader-new.min.css
 
 build-dnd-standalone: _build
-	$(NPM-BIN)/uglifyjs $(DND-FILES) -o $(BUILD-OUT-DIR)/dnd.js -b -e window:global --source-map $(BUILD-OUT-DIR)/dnd.js.map -p relative
+	$(NPM-BIN)/uglifyjs --preamble $(PREAMBLE) $(DND-FILES) -o $(BUILD-OUT-DIR)/dnd.js -b -e window:global --source-map $(BUILD-OUT-DIR)/dnd.js.map -p relative
 
 build-dnd-standalone-min: _build
-	$(NPM-BIN)/uglifyjs $(DND-FILES) -o $(BUILD-OUT-DIR)/dnd.min.js -e window:global --source-map $(BUILD-OUT-DIR)/dnd.min.js.map -p relative
+	$(NPM-BIN)/uglifyjs --preamble $(PREAMBLE) $(DND-FILES) -o $(BUILD-OUT-DIR)/dnd.min.js -e window:global --source-map $(BUILD-OUT-DIR)/dnd.min.js.map -p relative
 
 build-dnd-standalone-jquery: _build
-	$(NPM-BIN)/uglifyjs $(DND-JQUERY-FILES) -o $(BUILD-OUT-DIR)/dnd.jquery.js -b -e window:global --source-map $(BUILD-OUT-DIR)/dnd.jquery.js.map -p relative
+	$(NPM-BIN)/uglifyjs --preamble $(PREAMBLE) $(DND-JQUERY-FILES) -o $(BUILD-OUT-DIR)/dnd.jquery.js -b -e window:global --source-map $(BUILD-OUT-DIR)/dnd.jquery.js.map -p relative
 
 build-dnd-standalone-jquery-min: _build
-	$(NPM-BIN)/uglifyjs $(DND-JQUERY-FILES) -o $(BUILD-OUT-DIR)/dnd.jquery.js -e window:global --source-map $(BUILD-OUT-DIR)/dnd.jquery.js.map -p relative
+	$(NPM-BIN)/uglifyjs --preamble $(PREAMBLE) $(DND-JQUERY-FILES) -o $(BUILD-OUT-DIR)/dnd.jquery.js -e window:global --source-map $(BUILD-OUT-DIR)/dnd.jquery.js.map -p relative
 
 build-core-traditional: _build
-	$(NPM-BIN)/uglifyjs $(TRADITIONAL-FILES) -o $(BUILD-OUT-DIR)/core.fine-uploader.js -b -e window:global --source-map $(BUILD-OUT-DIR)/core.fine-uploader.js.map -p relative
+	$(NPM-BIN)/uglifyjs --preamble $(PREAMBLE) $(TRADITIONAL-FILES) -o $(BUILD-OUT-DIR)/core.fine-uploader.js -b -e window:global --source-map $(BUILD-OUT-DIR)/core.fine-uploader.js.map -p relative
 
 build-core-traditional-min: _build
-	$(NPM-BIN)/uglifyjs $(TRADITIONAL-FILES) -o $(BUILD-OUT-DIR)/core.fine-uploader.min.js -e window:global --source-map $(BUILD-OUT-DIR)/core.fine-uploader.min.js.map -p relative
+	$(NPM-BIN)/uglifyjs --preamble $(PREAMBLE) $(TRADITIONAL-FILES) -o $(BUILD-OUT-DIR)/core.fine-uploader.min.js -e window:global --source-map $(BUILD-OUT-DIR)/core.fine-uploader.min.js.map -p relative
 
 build-core-traditional-jquery: _build
-	$(NPM-BIN)/uglifyjs $(TRADITIONAL-JQUERY-FILES) -o $(BUILD-OUT-DIR)/core.jquery.fine-uploader.js -b -e window:global --source-map $(BUILD-OUT-DIR)/core.jquery.fine-uploader.js.map -p relative
+	$(NPM-BIN)/uglifyjs --preamble $(PREAMBLE) $(TRADITIONAL-JQUERY-FILES) -o $(BUILD-OUT-DIR)/core.jquery.fine-uploader.js -b -e window:global --source-map $(BUILD-OUT-DIR)/core.jquery.fine-uploader.js.map -p relative
 
 build-core-traditional-jquery-min: _build
-	$(NPM-BIN)/uglifyjs $(TRADITIONAL-JQUERY-FILES) -o $(BUILD-OUT-DIR)/core.jquery.fine-uploader.min.js -e window:global --source-map $(BUILD-OUT-DIR)/core.jquery.fine-uploader.min.js.map -p relative
+	$(NPM-BIN)/uglifyjs --preamble $(PREAMBLE) $(TRADITIONAL-JQUERY-FILES) -o $(BUILD-OUT-DIR)/core.jquery.fine-uploader.min.js -e window:global --source-map $(BUILD-OUT-DIR)/core.jquery.fine-uploader.min.js.map -p relative
 
 build-ui-traditional: _build
-	$(NPM-BIN)/uglifyjs $(TRADITIONAL-UI-FILES) -o $(BUILD-OUT-DIR)/fine-uploader.js -b -e window:global --source-map $(BUILD-OUT-DIR)/fine-uploader.js.map -p relative
+	$(NPM-BIN)/uglifyjs --preamble $(PREAMBLE) $(TRADITIONAL-UI-FILES) -o $(BUILD-OUT-DIR)/fine-uploader.js -b -e window:global --source-map $(BUILD-OUT-DIR)/fine-uploader.js.map -p relative
 
 build-ui-traditional-min: _build
-	$(NPM-BIN)/uglifyjs $(TRADITIONAL-UI-FILES) -o $(BUILD-OUT-DIR)/fine-uploader.min.js -e window:global --source-map $(BUILD-OUT-DIR)/fine-uploader.min.js.map -p relative
+	$(NPM-BIN)/uglifyjs --preamble $(PREAMBLE) $(TRADITIONAL-UI-FILES) -o $(BUILD-OUT-DIR)/fine-uploader.min.js -e window:global --source-map $(BUILD-OUT-DIR)/fine-uploader.min.js.map -p relative
 
 build-ui-traditional-jquery: _build
-	$(NPM-BIN)/uglifyjs $(TRADITIONAL-UI-JQUERY-FILES) -o $(BUILD-OUT-DIR)/fine-uploader.jquery.js -b -e window:global --source-map $(BUILD-OUT-DIR)/jquery.fine-uploader.js.map -p relative
+	$(NPM-BIN)/uglifyjs --preamble $(PREAMBLE) $(TRADITIONAL-UI-JQUERY-FILES) -o $(BUILD-OUT-DIR)/fine-uploader.jquery.js -b -e window:global --source-map $(BUILD-OUT-DIR)/jquery.fine-uploader.js.map -p relative
 
 build-ui-traditional-jquery-min: _build
-	$(NPM-BIN)/uglifyjs $(TRADITIONAL-UI-JQUERY-FILES) -o $(BUILD-OUT-DIR)/fine-uploader.jquery.min.js -e window:global --source-map $(BUILD-OUT-DIR)/jquery.fine-uploader.min.js.map -p relative
+	$(NPM-BIN)/uglifyjs --preamble $(PREAMBLE) $(TRADITIONAL-UI-JQUERY-FILES) -o $(BUILD-OUT-DIR)/fine-uploader.jquery.min.js -e window:global --source-map $(BUILD-OUT-DIR)/jquery.fine-uploader.min.js.map -p relative
 
 build-core-s3: _build
-	$(NPM-BIN)/uglifyjs $(S3-FILES) -o $(BUILD-OUT-DIR)/s3.core.fine-uploader.js -b -e window:global --source-map $(BUILD-OUT-DIR)/s3.core.fine-uploader.js.map -p relative
+	$(NPM-BIN)/uglifyjs --preamble $(PREAMBLE) $(S3-FILES) -o $(BUILD-OUT-DIR)/s3.core.fine-uploader.js -b -e window:global --source-map $(BUILD-OUT-DIR)/s3.core.fine-uploader.js.map -p relative
 
 build-core-s3-min: _build
-	$(NPM-BIN)/uglifyjs $(S3-FILES) -o $(BUILD-OUT-DIR)/s3.core.fine-uploader.min.js -e window:global --source-map $(BUILD-OUT-DIR)/s3.core.fine-uploader.min.js.map -p relative
+	$(NPM-BIN)/uglifyjs --preamble $(PREAMBLE) $(S3-FILES) -o $(BUILD-OUT-DIR)/s3.core.fine-uploader.min.js -e window:global --source-map $(BUILD-OUT-DIR)/s3.core.fine-uploader.min.js.map -p relative
 
 build-core-s3-jquery: _build
-	$(NPM-BIN)/uglifyjs $(S3-JQUERY-FILES) -o $(BUILD-OUT-DIR)/s3.jquery.core.fine-uploader.js -b -e window:global --source-map $(BUILD-OUT-DIR)/s3.jquery.core.fine-uploader.js.map -p relative
+	$(NPM-BIN)/uglifyjs --preamble $(PREAMBLE) $(S3-JQUERY-FILES) -o $(BUILD-OUT-DIR)/s3.jquery.core.fine-uploader.js -b -e window:global --source-map $(BUILD-OUT-DIR)/s3.jquery.core.fine-uploader.js.map -p relative
 
 build-core-s3-jquery-min: _build
-	$(NPM-BIN)/uglifyjs $(S3-JQUERY-FILES) -o $(BUILD-OUT-DIR)/s3.jquery.core.fine-uploader.min.js -e window:global --source-map $(BUILD-OUT-DIR)/s3.jquery.core.fine-uploader.min.js.map -p relative
+	$(NPM-BIN)/uglifyjs --preamble $(PREAMBLE) $(S3-JQUERY-FILES) -o $(BUILD-OUT-DIR)/s3.jquery.core.fine-uploader.min.js -e window:global --source-map $(BUILD-OUT-DIR)/s3.jquery.core.fine-uploader.min.js.map -p relative
 
 build-ui-s3: _build
-	$(NPM-BIN)/uglifyjs $(S3-UI-FILES) -o $(BUILD-OUT-DIR)/s3.fine-uploader.js -b -e window:global --source-map $(BUILD-OUT-DIR)/s3.fine-uploader.js.map -p relative
+	$(NPM-BIN)/uglifyjs --preamble $(PREAMBLE) $(S3-UI-FILES) -o $(BUILD-OUT-DIR)/s3.fine-uploader.js -b -e window:global --source-map $(BUILD-OUT-DIR)/s3.fine-uploader.js.map -p relative
 
 build-ui-s3-min: _build
-	$(NPM-BIN)/uglifyjs $(S3-UI-JQUERY-FILES) -o $(BUILD-OUT-DIR)/s3.jquery.fine-uploader.min.js -e window:global --source-map $(BUILD-OUT-DIR)/s3.jquery.fine-uploader.min.js.map -p relative
+	$(NPM-BIN)/uglifyjs --preamble $(PREAMBLE) $(S3-UI-JQUERY-FILES) -o $(BUILD-OUT-DIR)/s3.jquery.fine-uploader.min.js -e window:global --source-map $(BUILD-OUT-DIR)/s3.jquery.fine-uploader.min.js.map -p relative
 
 build-ui-s3-jquery: _build
-	$(NPM-BIN)/uglifyjs $(S3-UI-JQUERY-FILES) -o $(BUILD-OUT-DIR)/s3.jquery.fine-uploader.js -b -e window:global --source-map $(BUILD-OUT-DIR)/s3.jquery.fine-uploader.js.map -p relative
+	$(NPM-BIN)/uglifyjs --preamble $(PREAMBLE) $(S3-UI-JQUERY-FILES) -o $(BUILD-OUT-DIR)/s3.jquery.fine-uploader.js -b -e window:global --source-map $(BUILD-OUT-DIR)/s3.jquery.fine-uploader.js.map -p relative
 
 build-ui-s3-jquery-min: _build
-	$(NPM-BIN)/uglifyjs $(S3-UI-FILES) -o $(BUILD-OUT-DIR)/s3.fine-uploader.min.js -e window:global --source-map $(BUILD-OUT-DIR)/s3.fine-uploader.min.js.map -p relative
+	$(NPM-BIN)/uglifyjs --preamble $(PREAMBLE) $(S3-UI-FILES) -o $(BUILD-OUT-DIR)/s3.fine-uploader.min.js -e window:global --source-map $(BUILD-OUT-DIR)/s3.fine-uploader.min.js.map -p relative
 
 build-core-azure: _build
-	$(NPM-BIN)/uglifyjs $(AZURE-FILES) -o $(BUILD-OUT-DIR)/azure.core.fine-uploader.js -b -e window:global --source-map $(BUILD-OUT-DIR)/azure.core.fine-uploader.js.map -p relative
+	$(NPM-BIN)/uglifyjs --preamble $(PREAMBLE) $(AZURE-FILES) -o $(BUILD-OUT-DIR)/azure.core.fine-uploader.js -b -e window:global --source-map $(BUILD-OUT-DIR)/azure.core.fine-uploader.js.map -p relative
 
 build-core-azure-min: _build
-	$(NPM-BIN)/uglifyjs $(AZURE-FILES) -o $(BUILD-OUT-DIR)/azure.core.fine-uploader.min.js -e window:global --source-map $(BUILD-OUT-DIR)/azure.core.fine-uploader.min.js.map -p relative
+	$(NPM-BIN)/uglifyjs --preamble $(PREAMBLE) $(AZURE-FILES) -o $(BUILD-OUT-DIR)/azure.core.fine-uploader.min.js -e window:global --source-map $(BUILD-OUT-DIR)/azure.core.fine-uploader.min.js.map -p relative
 
 build-core-azure-jquery: _build
-	$(NPM-BIN)/uglifyjs $(AZURE-JQUERY-FILES) -o $(BUILD-OUT-DIR)/azure.jquery.core.fine-uploader.js -b -e window:global --source-map $(BUILD-OUT-DIR)/azure.jquery.core.fine-uploader.js.map -p relative
+	$(NPM-BIN)/uglifyjs --preamble $(PREAMBLE) $(AZURE-JQUERY-FILES) -o $(BUILD-OUT-DIR)/azure.jquery.core.fine-uploader.js -b -e window:global --source-map $(BUILD-OUT-DIR)/azure.jquery.core.fine-uploader.js.map -p relative
 
 build-core-azure-jquery-min: _build
-	$(NPM-BIN)/uglifyjs $(AZURE-JQUERY-FILES) -o $(BUILD-OUT-DIR)/azure.jquery.core.fine-uploader.min.js -e window:global --source-map $(BUILD-OUT-DIR)/azure.jquery.core.fine-uploader.min.js.map -p relative
+	$(NPM-BIN)/uglifyjs --preamble $(PREAMBLE) $(AZURE-JQUERY-FILES) -o $(BUILD-OUT-DIR)/azure.jquery.core.fine-uploader.min.js -e window:global --source-map $(BUILD-OUT-DIR)/azure.jquery.core.fine-uploader.min.js.map -p relative
 
 build-ui-azure: _build
-	$(NPM-BIN)/uglifyjs $(AZURE-UI-FILES) -o $(BUILD-OUT-DIR)/azure.fine-uploader.js -b -e window:global --source-map $(BUILD-OUT-DIR)/azure.fine-uploader.js.map -p relative
+	$(NPM-BIN)/uglifyjs --preamble $(PREAMBLE) $(AZURE-UI-FILES) -o $(BUILD-OUT-DIR)/azure.fine-uploader.js -b -e window:global --source-map $(BUILD-OUT-DIR)/azure.fine-uploader.js.map -p relative
 
 build-ui-azure-min: _build
-	$(NPM-BIN)/uglifyjs $(AZURE-UI-FILES) -o $(BUILD-OUT-DIR)/azure.fine-uploader.min.js -e window:global --source-map $(BUILD-OUT-DIR)/azure.fine-uploader.min.js.map -p relative
+	$(NPM-BIN)/uglifyjs --preamble $(PREAMBLE) $(AZURE-UI-FILES) -o $(BUILD-OUT-DIR)/azure.fine-uploader.min.js -e window:global --source-map $(BUILD-OUT-DIR)/azure.fine-uploader.min.js.map -p relative
 
 build-ui-azure-jquery: _build
-	$(NPM-BIN)/uglifyjs $(AZURE-UI-JQUERY-FILES) -o $(BUILD-OUT-DIR)/azure.jquery.fine-uploader.js -b -e window:global --source-map $(BUILD-OUT-DIR)/azure.jquery.fine-uploader.js.map -p relative
+	$(NPM-BIN)/uglifyjs --preamble $(PREAMBLE) $(AZURE-UI-JQUERY-FILES) -o $(BUILD-OUT-DIR)/azure.jquery.fine-uploader.js -b -e window:global --source-map $(BUILD-OUT-DIR)/azure.jquery.fine-uploader.js.map -p relative
 
 build-ui-azure-jquery-min: _build
-	$(NPM-BIN)/uglifyjs $(AZURE-UI-JQUERY-FILES) -o $(BUILD-OUT-DIR)/azure.jquery.fine-uploader.min.js -e window:global --source-map $(BUILD-OUT-DIR)/azure.jquery.fine-uploader.min.js.map -p relative
+	$(NPM-BIN)/uglifyjs --preamble $(PREAMBLE) $(AZURE-UI-JQUERY-FILES) -o $(BUILD-OUT-DIR)/azure.jquery.fine-uploader.min.js -e window:global --source-map $(BUILD-OUT-DIR)/azure.jquery.fine-uploader.min.js.map -p relative
 
 build-all-core: _build
-	$(NPM-BIN)/uglifyjs $(ALL-CORE-FILES) -o $(BUILD-OUT-DIR)/all.core.fine-uploader.js -b -e window:global --source-map $(BUILD-OUT-DIR)/all.core.fine-uploader.js.map -p relative
+	$(NPM-BIN)/uglifyjs --preamble $(PREAMBLE) $(ALL-CORE-FILES) -o $(BUILD-OUT-DIR)/all.core.fine-uploader.js -b -e window:global --source-map $(BUILD-OUT-DIR)/all.core.fine-uploader.js.map -p relative
 
 build-all-core-min: _build
 	$(NPM-BIN)/uglifyjs $(ALL-CORE-FILES) -o $(BUILD-OUT-DIR)/all.core.fine-uploader.min.js -e window:global --source-map $(BUILD-OUT-DIR)/all.core.fine-uploader.min.js.map -p relative
 
 build-all-core-jquery: _build
-	$(NPM-BIN)/uglifyjs $(ALL-CORE-JQUERY-FILES) -o $(BUILD-OUT-DIR)/all.jquery.core.fine-uploader.js -b -e window:global --source-map $(BUILD-OUT-DIR)/all.jquery.core.fine-uploader.js.map -p relative
+	$(NPM-BIN)/uglifyjs --preamble $(PREAMBLE) $(ALL-CORE-JQUERY-FILES) -o $(BUILD-OUT-DIR)/all.jquery.core.fine-uploader.js -b -e window:global --source-map $(BUILD-OUT-DIR)/all.jquery.core.fine-uploader.js.map -p relative
 
 build-all-core-jquery-min: _build
-	$(NPM-BIN)/uglifyjs $(ALL-CORE-JQUERY-FILES) -o $(BUILD-OUT-DIR)/all.jquery.core.fine-uploader.min.js -e window:global --source-map $(BUILD-OUT-DIR)/all.jquery.core.fine-uploader.min.js.map -p relative
+	$(NPM-BIN)/uglifyjs --preamble $(PREAMBLE) $(ALL-CORE-JQUERY-FILES) -o $(BUILD-OUT-DIR)/all.jquery.core.fine-uploader.min.js -e window:global --source-map $(BUILD-OUT-DIR)/all.jquery.core.fine-uploader.min.js.map -p relative
 
 build-all-ui: _build
-	$(NPM-BIN)/uglifyjs $(ALL-FILES) -o $(BUILD-OUT-DIR)/all.fine-uploader.js -b -e window:global --source-map $(BUILD-OUT-DIR)/all.fine-uploader.js.map -p relative
+	$(NPM-BIN)/uglifyjs --preamble $(PREAMBLE) $(ALL-FILES) -o $(BUILD-OUT-DIR)/all.fine-uploader.js -b -e window:global --source-map $(BUILD-OUT-DIR)/all.fine-uploader.js.map -p relative
 
 build-all-ui-min: _build
-	$(NPM-BIN)/uglifyjs $(ALL-FILES) -o $(BUILD-OUT-DIR)/all.fine-uploader.min.js -e window:global --source-map $(BUILD-OUT-DIR)/all.fine-uploader.min.js.map -p relative
+	$(NPM-BIN)/uglifyjs --preamble $(PREAMBLE) $(ALL-FILES) -o $(BUILD-OUT-DIR)/all.fine-uploader.min.js -e window:global --source-map $(BUILD-OUT-DIR)/all.fine-uploader.min.js.map -p relative
 
 build-all-ui-jquery: _build
-	$(NPM-BIN)/uglifyjs $(ALL-JQUERY-FILES) -o $(BUILD-OUT-DIR)/all.jquery.fine-uploader.js -b -e window:global --source-map $(BUILD-OUT-DIR)/all.jquery.fine-uploader.js.map -p relative
+	$(NPM-BIN)/uglifyjs --preamble $(PREAMBLE) $(ALL-JQUERY-FILES) -o $(BUILD-OUT-DIR)/all.jquery.fine-uploader.js -b -e window:global --source-map $(BUILD-OUT-DIR)/all.jquery.fine-uploader.js.map -p relative
 
 build-all-ui-jquery-min: _build
-	$(NPM-BIN)/uglifyjs $(ALL-JQUERY-FILES) -o $(BUILD-OUT-DIR)/all.jquery.fine-uploader.min.js -e window:global --source-map $(BUILD-OUT-DIR)/all.jquery.fine-uploader.min.js.map -p relative
+	$(NPM-BIN)/uglifyjs --preamble $(PREAMBLE) $(ALL-JQUERY-FILES) -o $(BUILD-OUT-DIR)/all.jquery.fine-uploader.min.js -e window:global --source-map $(BUILD-OUT-DIR)/all.jquery.fine-uploader.min.js.map -p relative
 
 build: \
 	build-dnd-standalone \