[CentOS] current situation with flash plugins?

Is Adobe the only provider of flash plugins?
Is it still a gaping security hole?
Do the answers depend on the browser?

-- 
Michael   hennebry at web.cs.ndsu.NoDak.edu
"Sorry but your password must contain an uppercase letter, a number,
a haiku, a gang sign, a heiroglyph, and the blood of a virgin."
                                                              --  someeecards