I think discussion of Firefox 24 is a reasonable thing to have on OS/2 World. I don't think its healthy for a platform to do all of it's discussion inside bug reporting websites. I do file bug reports, as some of you should probably know.
I'm running Firefox 24 for my daily web browsing. If I hit a page with a lot of Flash animation, the operating system appears to halt. Control-Alt-Del does not appear to work, or else I am not patient enough. There is some middle ground -- if a page has just enough Flash animations, then Firefox stops, but it can be killed from CADH/TOP.
With Flash disabled from the add-ons menu in Firefox, I can browse the same pages. It may be a bit slow, but they work. This had not been the case for Firefox 17 or Firefox 10. They could not reliably disable the Flash plugin, nor could they render nasty, overweight pages without hanging.
As an end user, there is no way to know if this would be better a Flash bug or a Firefox bug. Nor is it clear how to submit a reproducable scenario, since the web pages in question change every few minutes, depending on what is embedded in them (which probably depends on the user's cookies anyway.)