mozilla crash reports are just like microsoft crash reports, both send crash information, so open source is a moot point. how do you install an older kernel in parallel? do you mean reboot into an older kernel? you can dual boot a windows box and do the same. thats not even taking into account using VMware with snapshots, which would work on linux, windows, solaris, etc

you're not on topic.. the idea behind my reply was to show that users giving feedback to any application's developers (open source or not) is simply that, feedback, and you should set your expectations accordingly and understand you do not know all the ramifications your suggestion could involve, the ratio of time spent vs how important it is, preventing feature creep, and more.

if you've ever written an application, you'll know that one user will commend a feature as being invaluble, while another tries to rip you apart and tell you how it should change.

this has nothing to do with open source

"Kernel 2.8.1 beta testers are disputing whether or not the linux community is taking notice of their feedback. The dispute follows a blog post by Linus Torvalds, the man in charge of engineering Kernel 2.8.1. He notes that in one week in January the linux community received data through Kernel 2.8.1's automatic feedback system every 15 seconds. According to Linus, it's impossible to keep everyone happy. That's partly because there are only so many changes the linux community can make to the system and still finish it, and partly because in many cases testers often have opposing views about a feature."

So its going to be like hulu.com