User-Agent: Build Identifier: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.3a5pre) Gecko/20100525 Minefield/3.7a5pre If "http://mozilla.org" is in the mouse buffer, paste is OK. Without a schema ("http://") the paste has no visible action. Reproducible: Always Steps to Reproduce: 1. Open an editor or console type "mozilla.org" 2. mark with mouse 3. open new tab, middle-click into empty space Actual Results: nothing visible Expected Results: Act as if "mozilla.org" + RETURN has been put into the address bar This is the standard behavior in 3.5.9, in 3.6.3 and in probably every release before.

This was caused by the fix in bug 414345. WFM: Mozilla/5.0 (X11; U; Linux i686 (x86_64); en-US; rv:1.9.2.17) Gecko/20110420 Firefox/3.6.17 Reproduced: Mozilla/5.0 (X11; Linux x86_64; rv:2.0.1) Gecko/20100101 Firefox/4.0.1 Mozilla/5.0 (X11; Linux x86_64; rv:5.0) Gecko/20100101 Firefox/5.0 Mozilla/5.0 (X11; Linux x86_64; rv:6.0a2) Gecko/20110531 Firefox/6.0a2 Mozilla/5.0 (X11; Linux x86_64; rv:7.0a1) Gecko/20110531 Firefox/7.0a1

Not a duplicate, but bug 579570 may be of interest anyway.