From 6333e0b5ad234c0c3b03a8fbc264a5725de501a2 Mon Sep 17 00:00:00 2001
From: Dan Stillman <dstillman@zotero.org>
Date: Fri, 21 Apr 2017 07:37:54 -0400
Subject: [PATCH] Fix in-browser PDF viewing in Firefox 53

Use file:// URLs for viewing attachments instead of zotero://attachment,
which the new version of PDF.js in Fx53 doesn't like.
---
 chrome/content/zotero/zoteroPane.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/chrome/content/zotero/zoteroPane.js b/chrome/content/zotero/zoteroPane.js
index a0a18750d..5ca1128ae 100644
--- a/chrome/content/zotero/zoteroPane.js
+++ b/chrome/content/zotero/zoteroPane.js
@@ -3572,7 +3572,7 @@ var ZoteroPane = new function()
 				}
 				
 				if (!externalViewer) {
-					var url = 'zotero://attachment/' + itemID + '/';
+					let url = Services.io.newFileURI(file).spec;
 					this.loadURI(url, event);
 				}
 				else {