Double click seems to work for me on Mars.
GtkRecording.ogv (video/ogg), 1.63 MB, created by Leo Ufimtsev CLA on 2015-07-20 11:20:05 EDT
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Creator: Leo Ufimtsev CLA
Created: 2015-07-20 11:20:05 EDT
Size: 1.63 MB

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Attachments on bug 312568: 221871 | 230644 | 255028 | 255301