Fix: in Firefox < 11.0 the outerHTML of "<br>" becomes "<br></br>" and causes insertSource to be buggy. Rework getOuterHTML for versions without native outerHTML.
Fix: in Firefox < 11.0 the outerHTML of "<br>" becomes "<br></br>" and causes insertSource to be buggy. Rework getOuterHTML for versions without native outerHTML.

danny0838/firefox-scrapbook,danny0838/firefox-scrapbook