Just as an FYI: I know ARAS 10.0 only is documented to support Firefox 24, however it still worked just fine for all versions of Firefox up to version 33, which was just released and pushed as an Auto update on Monday (10/20).
Versions of Firefox > 33 no longer draw main Item grids correctly. Also, the inBasket no longer displays correctly.
From the little poking around I have been able to do in Firebug, this seems like it may be a Locale/CultureInfo issue, as I consistently get errors from the Aras.I18NUtils._I18NConverter.$B function under the IOM.ScriptSharp.js file
Like I said, Firefox versions 32 and below seem to be A-OK, but 33 or above all have this same issue.
I will update this post if I am able to come up with any fixes/workarounds.