diff --git a/lib/source-map/source-map-consumer.js b/lib/source-map/source-map-consumer.js
index e7b3538e..1855df42 100644
--- a/lib/source-map/source-map-consumer.js
+++ b/lib/source-map/source-map-consumer.js
@@ -298,9 +298,9 @@ define(function (require, exports, module) {
     };
 
   /**
-   * Returns the original source content. The only argument is
-   * the url of the original source file. Returns null if no
-   * original source content is availible.
+   * Returns the original source content. The only argument is the url of the
+   * original source file. Returns null if no original source content is
+   * availible.
    */
   SourceMapConsumer.prototype.sourceContentFor =
     function SourceMapConsumer_sourceContentFor(aSource) {
@@ -318,10 +318,21 @@ define(function (require, exports, module) {
 
       var url;
       if (this.sourceRoot
-          && (url = util.urlParse(this.sourceRoot))
-          && (!url.path || url.path == "/")
-          && this._sources.has("/" + aSource)) {
-        return this.sourcesContent[this._sources.indexOf("/" + aSource)];
+          && (url = util.urlParse(this.sourceRoot))) {
+        // XXX: file:// URIs and absolute paths lead to unexpected behavior for
+        // many users. We can help them out when they expect file:// URIs to
+        // behave like it would if they were running a local HTTP server. See
+        // https://bugzilla.mozilla.org/show_bug.cgi?id=885597.
+        var fileUriAbsPath = aSource.replace(/^file:\/\//, "");
+        if (url.scheme == "file"
+            && this._sources.has(fileUriAbsPath)) {
+          return this.sourcesContent[this._sources.indexOf(fileUriAbsPath)]
+        }
+
+        if ((!url.path || url.path == "/")
+            && this._sources.has("/" + aSource)) {
+          return this.sourcesContent[this._sources.indexOf("/" + aSource)];
+        }
       }
 
       throw new Error('"' + aSource + '" is not in the SourceMap.');
diff --git a/test/source-map/test-source-map-consumer.js b/test/source-map/test-source-map-consumer.js
index 2f9a23d0..0d566e8c 100644
--- a/test/source-map/test-source-map-consumer.js
+++ b/test/source-map/test-source-map-consumer.js
@@ -303,4 +303,19 @@ define(function (require, exports, module) {
     assert.equal(map.sourceContentFor("/a"), "foo");
   };
 
+  exports['test bug 885597'] = function (assert, util) {
+    var map = new SourceMapConsumer({
+      "version": 3,
+      "file": "foo.js",
+      "sourceRoot": "file:///Users/AlGore/Invented/The/Internet/",
+      "sources": ["/a"],
+      "names": [],
+      "mappings": "AACA",
+      "sourcesContent": ["foo"]
+    });
+
+    var s = map.sources[0];
+    assert.equal(map.sourceContentFor(s), "foo");
+  };
+
 });