diff --git a/chrome/content/zotero/xpcom/translation/translate.js b/chrome/content/zotero/xpcom/translation/translate.js
index ffde3fd48..54edc41a7 100644
--- a/chrome/content/zotero/xpcom/translation/translate.js
+++ b/chrome/content/zotero/xpcom/translation/translate.js
@@ -630,14 +630,11 @@ Zotero.Translate.Sandbox = {
 					}
 				}
 				
-				// Remap attachment (but not link) URLs
-				var properToProxy = translate.translator[0].properToProxy;
-				if(properToProxy && item.attachments) {
-					for(var i=0; i<item.attachments.length; i++) {
-						var attachment = item.attachments[i];
-						if(attachment.snapshot !== false && attachment.url) {
-							attachment.url = properToProxy(attachment.url);
-						}
+				for(var i=0; i<item.attachments.length; i++) {
+					var attachment = item.attachments[i];
+					if(attachment.url) {
+						// Remap attachment (but not link) URLs
+						attachment.url = translate.resolveURL(attachment.url, attachment.snapshot === false);
 					}
 				}
 			}
@@ -1185,6 +1182,57 @@ Zotero.Translate.Base.prototype = {
 	 * Return the progress of the import operation, or null if progress cannot be determined
 	 */
 	"getProgress":function() { return null },
+
+	/**
+	 * Translate a URL to a form that goes through the appropriate proxy, or
+	 * convert a relative URL to an absolute one
+	 *
+	 * @param {String} url
+	 * @param {Boolean} dontUseProxy If true, don't convert URLs to variants
+	 *     that use the proxy
+	 * @type String
+	 * @private
+	 */
+	"resolveURL":function(url, dontUseProxy) {
+		const hostPortRe = /^((?:http|https|ftp):)\/\/([^\/]+)/i;
+		// resolve local URL
+		var resolved = "";
+		
+		// convert proxy to proper if applicable
+		if(hostPortRe.test(url)) {
+			if(this.translator && this.translator[0]
+					&& this.translator[0].properToProxy && !dontUseProxy) {
+				resolved = this.translator[0].properToProxy(url);
+			} else {
+				resolved = url;
+			}
+		} else if(Zotero.isFx) {
+			resolved = Components.classes["@mozilla.org/network/io-service;1"].
+				getService(Components.interfaces.nsIIOService).
+				newURI(this.location, "", null).resolve(url);
+		} else if(Zotero.isNode) {
+			resolved = require('url').resolve(this.location, url);
+		} else {
+			var a = document.createElement('a');
+	        a.href = url;
+	        resolved = a.href;
+		}
+		
+		/*var m = hostPortRe.exec(resolved);
+		if(!m) {
+			throw new Error("Invalid URL supplied for HTTP request: "+url);
+		} else if(this._translate.document && this._translate.document.location) {
+			var loc = this._translate.document.location;
+			if(this._translate._currentState !== "translate" && loc
+					&& (m[1].toLowerCase() !== loc.protocol.toLowerCase()
+					|| m[2].toLowerCase() !== loc.host.toLowerCase())) {
+				throw new Error("Attempt to access "+m[1]+"//"+m[2]+" from "+loc.protocol+"//"+loc.host
+					+" blocked: Cross-site requests are only allowed during translation");
+			}
+		}*/
+		
+		return resolved;
+	},
 	
 	/**
 	 * Executed on translator completion, either automatically from a synchronous scraper or as
diff --git a/chrome/content/zotero/xpcom/utilities_translate.js b/chrome/content/zotero/xpcom/utilities_translate.js
index a386b9e49..3975430aa 100644
--- a/chrome/content/zotero/xpcom/utilities_translate.js
+++ b/chrome/content/zotero/xpcom/utilities_translate.js
@@ -195,17 +195,18 @@ Zotero.Utilities.Translate.prototype.loadDocument = function(url, succeeded, fai
  * @ignore
  */
 Zotero.Utilities.Translate.prototype.processDocuments = function(urls, processor, done, exception) {
+	var translate = this._translate;
+
 	if(typeof(urls) == "string") {
-		urls = [this._convertURL(urls)];
+		urls = [translate.resolveURL(urls)];
 	} else {
 		for(var i in urls) {
-			urls[i] = this._convertURL(urls[i]);
+			urls[i] = translate.resolveURL(urls[i]);
 		}
 	}
 	
 	// Unless the translator has proposed some way to handle an error, handle it
 	// by throwing a "scraping error" message
-	var translate = this._translate;
 	if(exception) {
 		var myException = function(e) {
 			var browserDeleted;
@@ -300,7 +301,9 @@ Zotero.Utilities.Translate.prototype.processDocuments = function(urls, processor
 * @return {Boolean} True if the request was sent, or false if the browser is offline
 */
 Zotero.Utilities.Translate.prototype.doGet = function(urls, processor, done, responseCharset) {
-	var callAgain = false;
+	var callAgain = false,
+		me = this,
+		translate = this._translate;
 	
 	if(typeof(urls) == "string") {
 		var url = urls;
@@ -309,11 +312,9 @@ Zotero.Utilities.Translate.prototype.doGet = function(urls, processor, done, res
 		var url = urls.shift();
 	}
 	
-	url = this._convertURL(url);
+	url = translate.resolveURL(url);
 	
-	var me = this;
-	
-	this._translate.incrementAsyncProcesses("Zotero.Utilities.Translate#doGet");
+	translate.incrementAsyncProcesses("Zotero.Utilities.Translate#doGet");
 	var xmlhttp = Zotero.HTTP.doGet(url, function(xmlhttp) {
 		try {
 			if(processor) {
@@ -327,9 +328,9 @@ Zotero.Utilities.Translate.prototype.doGet = function(urls, processor, done, res
 					done();
 				}
 			}
-			me._translate.decrementAsyncProcesses("Zotero.Utilities.Translate#doGet");
+			translate.decrementAsyncProcesses("Zotero.Utilities.Translate#doGet");
 		} catch(e) {
-			me._translate.complete(false, e);
+			translate.complete(false, e);
 		}
 	}, responseCharset, this._translate.cookieSandbox);
 }
@@ -339,10 +340,10 @@ Zotero.Utilities.Translate.prototype.doGet = function(urls, processor, done, res
  * @ignore
  */
 Zotero.Utilities.Translate.prototype.doPost = function(url, body, onDone, headers, responseCharset) {
-	url = this._convertURL(url);
-	
 	var translate = this._translate;
-	this._translate.incrementAsyncProcesses("Zotero.Utilities.Translate#doPost");
+	url = translate.resolveURL(url);
+	
+	translate.incrementAsyncProcesses("Zotero.Utilities.Translate#doPost");
 	var xmlhttp = Zotero.HTTP.doPost(url, body, function(xmlhttp) {
 		try {
 			onDone(xmlhttp.responseText, xmlhttp);
@@ -353,55 +354,6 @@ Zotero.Utilities.Translate.prototype.doPost = function(url, body, onDone, header
 	}, headers, responseCharset, translate.cookieSandbox ? translate.cookieSandbox : undefined);
 }
 
-/**
- * Translate a URL to a form that goes through the appropriate proxy, or convert a relative URL to
- * an absolute one
- *
- * @param {String} url
- * @type String
- * @private
- */
-Zotero.Utilities.Translate.prototype._convertURL = function(url) {
-	const hostPortRe = /^((?:http|https|ftp):)\/\/([^\/]+)/i;
-	// resolve local URL
-	var resolved = "";
-	
-	// convert proxy to proper if applicable
-	if(hostPortRe.test(url)) {
-		if(this._translate.translator && this._translate.translator[0]
-				&& this._translate.translator[0].properToProxy) {
-			resolved = this._translate.translator[0].properToProxy(url);
-		} else {
-			resolved = url;
-		}
-	} else if(Zotero.isFx) {
-		resolved = Components.classes["@mozilla.org/network/io-service;1"].
-			getService(Components.interfaces.nsIIOService).
-			newURI(this._translate.location, "", null).resolve(url);
-	} else if(Zotero.isNode) {
-		resolved = require('url').resolve(this._translate.location, url);
-	} else {
-		var a = document.createElement('a');
-        a.href = url;
-        resolved = a.href;
-	}
-	
-	/*var m = hostPortRe.exec(resolved);
-	if(!m) {
-		throw new Error("Invalid URL supplied for HTTP request: "+url);
-	} else if(this._translate.document && this._translate.document.location) {
-		var loc = this._translate.document.location;
-		if(this._translate._currentState !== "translate" && loc
-				&& (m[1].toLowerCase() !== loc.protocol.toLowerCase()
-				|| m[2].toLowerCase() !== loc.host.toLowerCase())) {
-			throw new Error("Attempt to access "+m[1]+"//"+m[2]+" from "+loc.protocol+"//"+loc.host
-				+" blocked: Cross-site requests are only allowed during translation");
-		}
-	}*/
-	
-	return resolved;
-}
-
 Zotero.Utilities.Translate.prototype.__exposedProps__ = {"HTTP":"r"};
 for(var j in Zotero.Utilities.Translate.prototype) {
 	if(typeof Zotero.Utilities.Translate.prototype[j] === "function" && j[0] !== "_" && j != "Translate") {