See the view-source of the url. When selecting the text, you see the text move, which should not happen. This does not happen on branch.
Regression window is http://bonsai.mozilla.org/cvsquery.cgi?module=PhoenixTinderbox&date=explicit&mindate=1203145320&maxdate=1203176399 -> bug 392785.
That exposed it, but I think the actual problem is in bug 423676. It would be interesting to know whether the patch there fixes this bug.
This problem is no more reproducible on the latest versions. Due to the age of the defect and inability to duplicate the issue, I am going ahead and closing the bug. In case you see the problem again, please feel free to open it. Tested on: Name Firefox Version 47.0a2 Build ID 20160407004050 User Agent Mozilla/5.0 (Windows NT 6.1; WOW64; rv:47.0) Gecko/20100101 Firefox/47.0
Status: NEW → RESOLVED
Last Resolved: 2 years ago
Resolution: --- → WORKSFORME
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