I'm not sure how Firefox handles its spell-checking, but note that aspell doesn't know about Ubuntu either.
ongardie@tablet:~$ aspell -a @(#) International Ispell Version 3.1.20 (but really Aspell 0.60.4) dog *
Ubuntu & Ubuntu 31 0: Bunt, Bantu, Bounty, Unburnt, Urbanity, Subunit, Burnt, Unbent, Bent, Abound, Abut, Aunt, Unto, Burnout, Unity, Ubangi, Unit, Untie, Auburn, Int, Unite, Burnett, Unbound, Cobnut, Benet, Urban, About, Bound, Undue, Ont, Ant
cat *
At least OpenOffice gets it. :)
I'm not sure how Firefox handles its spell-checking, but note that aspell doesn't know about Ubuntu either.
ongardie@tablet:~$ aspell -a
@(#) International Ispell Version 3.1.20 (but really Aspell 0.60.4)
dog
*
Ubuntu
& Ubuntu 31 0: Bunt, Bantu, Bounty, Unburnt, Urbanity, Subunit, Burnt, Unbent, Bent, Abound, Abut, Aunt, Unto, Burnout, Unity, Ubangi, Unit, Untie, Auburn, Int, Unite, Burnett, Unbound, Cobnut, Benet, Urban, About, Bound, Undue, Ont, Ant
cat
*
At least OpenOffice gets it. :)