They didn't recommend the extensions. They linked them because they were "merely sharing to build on for this discussion".
Is all content in HN supposed to be professional and serious, or are humorous comments in fact allowed when discussing a market leading company who has had regular outages for a year and a half? (Yes, I know the actual reasons why GitHub are struggling.)
> Is all content in HN supposed to be professional and serious
No
> are humorous comments in fact allowed
Yes
Neither is what's going on here. It's reckless to share stuff you haven't even looked at yourself, that's fairly basic thing to care about. Sharing "here's a bunch of random GitHub repositories" isn't humor (I think?) nor would it been different if the text was "more professional and serious", whatever that means.
Why you so mad about someone trying to help others from getting hacked? Install all extensions you want, based on what someone recommend or what you find randomly on YouTube, but let others be educated about what that means for their own security, not sure who that hurts and why you'd wanna stop it.