--- a/widget/cocoa/nsMacSharingService.mm
+++ b/widget/cocoa/nsMacSharingService.mm
@@ -4,16 +4,21 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 #import <Cocoa/Cocoa.h>
 
 #include "nsMacSharingService.h"
 #include "nsCocoaUtils.h"
 #include "mozilla/MacStringHelpers.h"
 
+// List of sharingProviders that we do not want to expose to
+// the user, because they are duplicates or do not work correctly
+// within the context
+NSArray *filteredProviderTitles = @[@"Add to Reading List", @"Mail"];
+
 NS_IMPL_ISUPPORTS(nsMacSharingService, nsIMacSharingService)
 
 static NSString*
 NSImageToBase64(const NSImage* aImage)
 {
   [aImage lockFocus];
   NSBitmapImageRep* bitmapRep = [[NSBitmapImageRep alloc] initWithFocusedViewRect:NSMakeRect(0, 0, aImage.size.width, aImage.size.height)];
   [aImage unlockFocus];
@@ -45,25 +50,26 @@ nsMacSharingService::GetSharingProviders
   JS::Rooted<JSObject*> array(aCx, JS_NewArrayObject(aCx, 0));
   NSURL* url = [NSURL URLWithString:nsCocoaUtils::ToNSString(aUrlToShare)];
 
   NSArray* sharingService = [NSSharingService
                              sharingServicesForItems:[NSArray arrayWithObject:url]];
   int32_t serviceCount = 0;
 
   for (NSSharingService *currentService in sharingService) {
-
-    JS::Rooted<JSObject*> obj(aCx, JS_NewPlainObject(aCx));
+    if (![filteredProviderTitles containsObject:currentService.title]) {
+      JS::Rooted<JSObject*> obj(aCx, JS_NewPlainObject(aCx));
 
-    SetStrAttribute(aCx, obj, "title", currentService.title);
-    SetStrAttribute(aCx, obj, "menuItemTitle", currentService.menuItemTitle);
-    SetStrAttribute(aCx, obj, "image", NSImageToBase64(currentService.image));
+      SetStrAttribute(aCx, obj, "title", currentService.title);
+      SetStrAttribute(aCx, obj, "menuItemTitle", currentService.menuItemTitle);
+      SetStrAttribute(aCx, obj, "image", NSImageToBase64(currentService.image));
 
-    JS::Rooted<JS::Value> element(aCx, JS::ObjectValue(*obj));
-    JS_SetElement(aCx, array, serviceCount++, element);
+      JS::Rooted<JS::Value> element(aCx, JS::ObjectValue(*obj));
+      JS_SetElement(aCx, array, serviceCount++, element);
+    }
   }
 
   aResult.setObject(*array);
 
   return NS_OK;
   NS_OBJC_END_TRY_ABORT_BLOCK_NSRESULT;
 }
 

--- a/widget/tests/unit/test_macsharingservice.js
+++ b/widget/tests/unit/test_macsharingservice.js
@@ -13,15 +13,17 @@ function test_getSharingProviders()
   let sharingService = Cc["@mozilla.org/widget/macsharingservice;1"].
       getService(Ci.nsIMacSharingService);
   let providers = sharingService.getSharingProviders("http://example.org");
   Assert.ok(providers.length > 1, "There are providers returned");
   providers.forEach(provider => {
     Assert.ok("title" in provider, "Provider has title");
     Assert.ok("menuItemTitle" in provider, "Provider has menuItemTitle");
     Assert.ok("image" in provider, "Provider has image");
+
+    Assert.notEqual(provider.title, "Mail", "Known filtered provider not returned");
   });
 }
 
 function run_test()
 {
   test_getSharingProviders();
 }