If you have an older version of the RealPlayer software, it's possible that changes over the past year or two in Firefox have made it incompatible. I understand that you do not want to fish around for bits and pieces of the software, but perhaps if you just run a fresh install of the RealPlayer software that will be handled for you automatically?? if you have a particular affinity for this downloader, that might be the easiest thing to try. Otherwise, there are numerous alternate downloaders for Firefox that you could look into. ---- Meanwhile, we might be able to derive more information from your crash reports. When Firefox crashes, it usually records information about what was happening at that moment. You often will see the Mozilla Crash Reporter dialog come up. You can submit that data to Mozilla and share it with forum volunteers to see whether it points to the solution. Please check the last section of the support article "[[Firefox Crashes]]" for steps to get those crash IDs, and then post some of the recent ones here.