Answer
No, flash can not run on all browers... for a list of ones it can run on visit, http://www.macromedia.com/software/flash/flashpro/productinfo/systemreqs/
on windows xp: microsoft internet explorer 6.0, firefox 1.x, mozilla 1.x, netscape 7.x and above, compuserve 7, aol 9, opera 7.11 and above
