Markdown not rendered on multiprocess Firefox

[ogadaki]

Rendering doesn't work when opening a .md file with Firefox developper edition (43.0a2).

I did some debugging that shows that an exception is raised on loading:

NS_ERROR_XPC_CANT_PASS_CPOW_TO_NATIVE

It's illegal to pass a CPOW to native code arg 4 [nsIParserUtils.parseFragment]

parseHTML@chrome://markdown-viewer/content/markdown-viewer.js:38:1
MarkdownViewer.onPageLoad@chrome://markdown-viewer/content/markdown-viewer.js:84:20
EventTargetParent.dispatch/<@resource://gre/modules/RemoteAddonsParent.jsm:564:15
Prefetcher.withPrefetching@resource://gre/modules/Prefetcher.jsm:460:14
EventTargetParent.dispatch@resource://gre/modules/RemoteAddonsParent.jsm:560:11
EventTargetParent.receiveMessage@resource://gre/modules/RemoteAddonsParent.jsm:508:1

And there are lots of unsafe CPOW usage messages in the console.

So, the problem seems to appear with multiprocess versions of Firefox.

I use Markdown Viewer 1.8.1-signed.

According to this article it seems that issues between plugins and CPOW can happen but are solvable. Maybe this MDN page contains helpfull informations.

This issue is related to issues #41 and #42 but I am creating a new one with a more appropriate title. I hope it's ok!

[Thiht]

It's not related to #41 and #42 so no worries :)

I'll try to look into it.

[gaul]

This is now an issue with e10s enabled with Firefox 44.0b4 on Linux.

[Thiht]

Centralized on #62