How you mentioned it’s a horrible idea in the long run is exactly why I don’t do this for anything other than trying to send a link.

If I’m standing next to a vampire and give them the shirt off my back, does my shirt turn invisible in the mirror when they put it on?

If a vampire gives me their shirt, at what point does it become visible in the mirror?

What if the vampire is wearing a rope- can they spool out a hundred feet of mirror-invisible rope as long as some is on their body?

I feel there’s a ton of applications for vampires- optics use mirrors a lot, can they wear a vehicle/tank/ship/etc and make it invisible to optics that utilize mirrors?

Did I miss something in school? Plenty of things heavier than helium aren’t metal. Boron, carbon, nitrogen, oxygen, fluorine, neon…

NoScript is duplicative with ublock medium mode, I am amazed people are still using it. It hasn’t been relevant for 5+ years by my estimation. Why use two addons when one you’re already using does it better?

https://github.com/gorhill/ublock/wiki/Blocking-mode:-medium-mode

Roughly similar to using Adblock Plus with many filter lists + NoScript with 1st-party scripts/frames automatically trusted.