Comment 17 for bug 359180

Here we are:

Shift+Alt+1 - First
Shift+Alt+n - Next
Shift+Alt+p - Previous
Shift+Alt+l - Last
Shift+Alt+Down - Next field
Shift+Alt+Up - Previous field
Shift+Alt+C - Copy original text (both singular and plural)
Shift+Alt+S - Save and continue

First field is autofocused.

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I went for Shift+Alt as they are used for Acceskey, and I assume browsers will try to reserve them.