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They all appear compatible in Firefox 8.x, can you be more specific?

edit: why have i been down voted, i took the time, and specifically checked :/

It wasn't me but... Don't overthink a single downvote: the up and down arrows are awfully close, and it's easy to misclick, particularly on a tablet.

Doesn't look so; OTOH a bunch of these only work on MS Windows.

Can you give examples?