x/pkgsite: Cookie Heading missing

[u0nel]

What is the URL of the page with the issue?

https://pkg.go.dev/net/http#ConnState.String

What is your user agent?

Mozilla/5.0 (X11; Linux x86_64; rv:93.0) Gecko/20100101 Firefox/93.0

Just updated Firefox and it's also not working with firefox 94
Mozilla/5.0 (X11; Linux x86_64; rv:94.0) Gecko/20100101 Firefox/94.0

Screenshot

What did you do?

I tried opening https://pkg.go.dev/net/http#Cookie in Firefox

What did you expect to see?

A heading

What did you see instead?

No heading.

I checked in Chromium and it works there.

[ameowlia]

The header showed up for me with:

• OS: macOS Big Sur v11.6
• Browser: firefox v84.0.1 and v91.0.2

[u0nel]

I just tried with firefox in safe mode, which worked, so a plugin causes the problem.