Steps to reproduce: 1. Open Error Console. 2. Go to some page that triggers a bunch of errors. http://www.mozilla.com/en-US/firefox/sync/firstrun.html does that right now, but might be fixed someday. 3. Select a single error, select Edit -> Copy. 4. Switch to another application and Paste the clipboard to confirm that one error was copied correctly. 5. Select multiple errors. BUG: This is not permitted via any means I was able to discover, including Edit -> Select All, Shift-clicking, and Command-clicking. This issue interfered with another bug report I was filing, and it seems an oversight that the UI does not (yet) permit multiple item selection.
Duplicate of Bug 67603 also see Bug 88057 As a workaround you can install my extension Console² which does provide this functionality. <http://console2.mozdev.org/>