Revert PR 6024 "[Firefox] Parse all JPEG images in the addon", since it's fixed upstream

src/core/stream.js

@@ -941,15 +941,6 @@ var JpegStream = (function JpegStreamClosure() {
    */
   JpegStream.prototype.isNativelySupported =
       function JpegStream_isNativelySupported(xref, res) {
-//#if FIREFOX
-//  // Workaround for:
-//  //  - https://bugzilla.mozilla.org/show_bug.cgi?id=1164199.
-//  //  - https://github.com/mozilla/pdf.js/issues/6017.
-//  // TODO: Remove this no later than July 1, 2015.
-//  if (/\bFirefox\/4[01].0/.test(navigator.userAgent)) {
-//    return false;
-//  }
-//#endif
     var cs = ColorSpace.parse(this.dict.get('ColorSpace', 'CS'), xref, res);
     return cs.name === 'DeviceGray' || cs.name === 'DeviceRGB';
   };
@@ -958,15 +949,6 @@ var JpegStream = (function JpegStreamClosure() {
    */
   JpegStream.prototype.isNativelyDecodable =
       function JpegStream_isNativelyDecodable(xref, res) {
-//#if FIREFOX
-//  // Workaround for:
-//  //  - https://bugzilla.mozilla.org/show_bug.cgi?id=1164199.
-//  //  - https://github.com/mozilla/pdf.js/issues/6017.
-//  // TODO: Remove this no later than July 1, 2015.
-//  if (/\bFirefox\/4[01].0/.test(navigator.userAgent)) {
-//    return false;
-//  }
-//#endif
     var cs = ColorSpace.parse(this.dict.get('ColorSpace', 'CS'), xref, res);
     var numComps = cs.numComps;
     return numComps === 1 || numComps === 3;