diff --git a/mozilla/js2/src/js2execution.cpp b/mozilla/js2/src/js2execution.cpp
index f78f0aedd16..b5fffee220c 100644
--- a/mozilla/js2/src/js2execution.cpp
+++ b/mozilla/js2/src/js2execution.cpp
@@ -2329,7 +2329,7 @@ JSValue JSValue::valueToUInt16(Context *, const JSValue& value)
     return JSValue((float64)d);
 }
 
-JSValue JSValue::valueToBoolean(Context *cx, const JSValue& value)
+JSValue JSValue::valueToBoolean(Context * /*cx*/, const JSValue& value)
 {
     switch (value.tag) {
     case f64_tag:
diff --git a/mozilla/js2/src/js2runtime.cpp b/mozilla/js2/src/js2runtime.cpp
index 00dc416db31..d6137305a02 100644
--- a/mozilla/js2/src/js2runtime.cpp
+++ b/mozilla/js2/src/js2runtime.cpp
@@ -1998,7 +1998,7 @@ static JSValue GlobalObject_ParseInt(Context *cx, const JSValue& /*thisValue*/,
     const char16 *sBegin = string->begin();
     float64 f = 0.0;
     if (sBegin)
-        f = stringToInteger(sBegin, string->end(), numEnd, radix);
+        f = stringToInteger(sBegin, string->end(), numEnd, (uint)radix);
     return JSValue(f);
 }
 
@@ -2015,7 +2015,7 @@ static JSValue GlobalObject_ParseFloat(Context *cx, const JSValue& /*thisValue*/
     return JSValue(f);
 }
 
-static JSValue GlobalObject_isNaN(Context *cx, const JSValue& /*thisValue*/, JSValue *argv, uint32 argc)
+static JSValue GlobalObject_isNaN(Context *cx, const JSValue& /*thisValue*/, JSValue *argv, uint32 /*argc*/)
 {
     float64 f = argv[0].toNumber(cx).f64;
     if (JSDOUBLE_IS_NaN(f))
@@ -2024,7 +2024,7 @@ static JSValue GlobalObject_isNaN(Context *cx, const JSValue& /*thisValue*/, JSV
         return kFalseValue;
 }
 
-static JSValue GlobalObject_isFinite(Context *cx, const JSValue& /*thisValue*/, JSValue *argv, uint32 argc)
+static JSValue GlobalObject_isFinite(Context *cx, const JSValue& /*thisValue*/, JSValue *argv, uint32 /*argc*/)
 {
     float64 f = argv[0].toNumber(cx).f64;
     if (JSDOUBLE_IS_FINITE(f))
diff --git a/mozilla/js2/src/js2runtime.h b/mozilla/js2/src/js2runtime.h
index b82c2969ec1..db4d0951b89 100644
--- a/mozilla/js2/src/js2runtime.h
+++ b/mozilla/js2/src/js2runtime.h
@@ -483,7 +483,7 @@ XXX ...couldn't get this to work...
         Access mAccess;
         uint16 mDepth;
         void emitCodeSequence(ByteCodeGen *bcg);
-        uint16 baseExpressionDepth() { return mDepth + 1; }
+        uint16 baseExpressionDepth() { return (uint16)(mDepth + 1); }
         void emitDelete(ByteCodeGen *bcg);
     };
 
diff --git a/mozilla/js2/src/jsdate.cpp b/mozilla/js2/src/jsdate.cpp
index c011220b7f4..b4f67fb9873 100644
--- a/mozilla/js2/src/jsdate.cpp
+++ b/mozilla/js2/src/jsdate.cpp
@@ -771,7 +771,7 @@ static JSValue Date_format(Context * /*cx*/, float64 date, formatspec format)
 }
 
 
-extern JSValue Date_TypeCast(Context *cx, const JSValue& thisValue, JSValue *argv, uint32 argc)
+extern JSValue Date_TypeCast(Context *cx, const JSValue& /*thisValue*/, JSValue * /*argv*/, uint32 /*argc*/)
 {
     int64 us, ms, us2ms;
     float64 msec_time;
@@ -861,7 +861,7 @@ JSValue Date_Constructor(Context *cx, const JSValue& thisValue, JSValue *argv, u
     return thatValue;
 }
 
-JSValue Date_parse(Context *cx, const JSValue& thisValue, JSValue *argv, uint32 /*argc*/)
+JSValue Date_parse(Context *cx, const JSValue& /*thisValue*/, JSValue *argv, uint32 /*argc*/)
 {
     const String *str = argv[0].toString(cx).string;
     float64 d = date_parseString(*str);
@@ -869,7 +869,7 @@ JSValue Date_parse(Context *cx, const JSValue& thisValue, JSValue *argv, uint32
     return JSValue(d);
 }
 
-JSValue Date_UTC(Context *cx, const JSValue& thisValue, JSValue *argv, uint32 argc)
+JSValue Date_UTC(Context *cx, const JSValue& /*thisValue*/, JSValue *argv, uint32 argc)
 {
     float64 array[MAXARGS];
     uint32 loop;