https://bugzilla.wikimedia.org/show_bug.cgi?id=62469

            Bug ID: 62469
           Summary: MultimediaViewer should have <img> fallback if
                    XMLHttpRequest fails
           Product: MediaWiki extensions
           Version: unspecified
          Hardware: All
                OS: All
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: Unprioritized
         Component: MultimediaViewer
          Assignee: wikibugs-l@lists.wikimedia.org
          Reporter: george.barn...@brickcraft.me
                CC: aarcos.w...@gmail.com, fflo...@wikimedia.org,
                    gti...@wikimedia.org, mtrac...@member.fsf.org
       Web browser: ---
   Mobile Platform: ---

Some MediaWiki installations have images hosted on a different domain than the
wiki, and in some cases do not have an 'Access-Control-Allow-Origin' header on
the image server domain. This causes the XMLHttpRequest for MultimediaViewer to
fail, and nothing but a black screen appears. So that the usability isn't
completely broken in these (and similar) situations, if the XMLHttpRequest to
get the image fails for any reason, MultimediaViewer should fall back to simply
displaying the image using an <img> tag.

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