actually bitsetting was design for DVD+R first.
you have dvd rom (udf1.02) with almost universal compatiblity and dvd video (udf 1.50) for newer player and for data you have packet writing (udf 2.00) and mt rainer (udf 2.01). the last that I checked (2-3 years ago) the latter 2 didn't even work with -R although that might be changed now.
this was the original bitsetting program. It change the game of dvd writing forever. before this it was hit or miss whether your dvd played in your dvd player. actually instant cd/dvd was first. but they didn't use the word bitsetting
my point being IE and FF both work now. one is not necessary better now (due to FF coming out. IE finally fix it's jack up engine with IE7). I like FF better because of customization. I also don't trust MS. it shouldn't have took another browser coming out for them to fix their plumbing