I think the point of the article is "by default". I don't know about Firefox but chrome has plug-in on demand as well. On linux, I have plugin on demand enabled in Opera, however on windows I have it disabled due to it's inability to start hidden flash. For example on Soundcloud. Maybe there's an action for enabling plug-in on demand that I could put to shortcut but I never got around to look into it. Anyway, flash on windows is just fine ...when not counting the adobe vulnerabilities(tm).