For bugs in Firefox Desktop, the Mozilla Foundation's web browser. For Firefox user interface issues in menus, developer tools, bookmarks, location bar, and preferences. Many Firefox bugs will either be filed here or in the Core product. (more info)
This is a follow up for bug 1211525.
It should be possible to preview SVG images similar to other images inside the 'Response' tab.
The raw data might be displayed using XML syntax highlighting as covered in bug 1247392.