- hpHostReport keeps giving me 404, so it's probably outdated (never got back any info from it)
- updating it, I would suggest to replace it with BlackLight (https://themarkup.org/blacklight?url=<url_to_scan>) which gives an interesting informations amount
- last but not least, I would try speaking with Mozilla/Firefox API directly, which seems analyzing websites too, giving warnings and such.
in the past I had Elwe Ewing account, on this forum, but now it seems it have been wiped out. Not a problem as I'm not reading/writing that much.