Tabs for switching between categories and all tabs of this type are not supported by qutebrowser (and probably here is same thing for other keyboard-driven browsers) - hints don't see them.
[Because, i think, they are something like inside-content reference than just a common url link. I actually don't know any of programming languages, so that just my assumption]
If you know a solution, please make changes about those tabs and don't use constructions like this in the future. Keyboard-driven community would be thankful for you. With respect.