1224512 - [e10s] RSS feed reader broken with external web readers (e.g. Yahoo) and only shows empty page

Status: RESOLVED DUPLICATE of bug 1109714

(Firefox Graveyard :: RSS Discovery and Preview, defect)

Description

[Henrik Skupin [:whimboo][⌚️UTC+2]]

With e10s enabled Firefox is not able to let the user view or manage a RSS feed with an external RSS reader like Yahoo or Feedly. Opening such a RSS feed will only open a blank page.

Steps:
1. Create a fresh profile
2. Open preferences and ensure that e10s is enabled
3. Go to the application pane and select Yahoo for "Web Feed".
4. Open https://blog.mozilla.org/feed/ in a new tab

> Notice that you will not be forwarded to the external web feed reader

Comment 1

[Henrik Skupin [:whimboo][⌚️UTC+2]]

Browser console reports:

uncaught exception: 2147500034 FeedConverter.js:205:19
NS_ERROR_XPC_GS_RETURNED_FAILURE: Component returned failure code: 0x80570016 (NS_ERROR_XPC_GS_RETURNED_FAILURE) [nsIJSCID.getService] FeedConverter.js:205:0

Source:

https://dxr.mozilla.org/mozilla-central/source/browser/components/feeds/FeedConverter.js#203

          switch (handler) {
            case "web":
              var wccr = 
  ->              Cc["@mozilla.org/embeddor.implemented/web-content-handler-registrar;1"].
                  getService(Ci.nsIWebContentConverterService);
              if ((feed.type == Ci.nsIFeed.TYPE_FEED &&
                   wccr.getAutoHandler(TYPE_MAYBE_FEED)) ||

Comment 2

[Marco Bonardo [:mak]]

I suspect it's just bug 1109714