Thanks for all your kind comments.
Don't give up on it--surely there are enough people who would love it. I would, and I'm in my fifties!
Maybe I'll do that. I still haven't found where I sign up at Mozilla.org to upload it and so people can download it securely and keep it updated. Since I only write Javascript, I never have registered as a Mozilla developer so maybe that's how you get access. I can't even find where you go on Mozilla.org to upload a new extension.
If I can locate where to upload it at Mozilla, maybe I'll offer it in a few weeks. I made a list of your names. I do still have some bugs to swat though. I recently implemented the full stylesheet_service for Mozilla but it hasn't solved all the issues yet. Like my control over which pages get applied styles is not yet granular enough (some pages at FR get styled though I don't want them styled). More research needed since I want something that isn't hackish but I do concede I may not know enough rocket science to resolve them all.
As for the easier stuff like IFRAMEing excerpted articles and embedding YouTubes, I have Greasemonkey script for that and might offer it if anyone is interested. The YouTubeing stuff is especially easy.
There are a variety of earlier screenshots at a GeoCities site I keep:
GeoCities - FRstyle
It also has a link at the bottom to the original stylesheet project here at FR, where JohnRob experimented with letting users upload their own custom stylesheets to use here. Screenshots as well as the stylesheets we were using. Nice idea but JohnRob apparently decided it was more trouble than it was worth and that too few users were interested. You'll see a few references in your profile settings that no longer work but they tie directly to that effort back in 2001.