I must be weird, but that was an actually useful feature, imaginative and with no parity elsewhere. For some period of time I used Firefox solely because I enjoyed that feature.
I still check in occasionally hoping to see it when I have to troubleshoot a related issue. And when I bring it up to people who remember it…well they seem kinda bummed about it being gone as well.
To be sure, its not a ravenous need, but it was a nice to have, that caught certain issues way early on. Even none of the 3rd party versions work anymore…
So, what would it take for it to make a comeback?