In newer versions of Firefox, Waterfox doesn't work... I apologize, it wasn't working because of other add-ons, but on clean browsers everything works fine. I'll look into what add-on is interfering....

Gets the job done! The visual guiding is fantastic and intuitive!

I think this is the best extension for anchors visualization-wise.
I wish it also worked with name anchors (and not just id)
And, if possible, making permissions more restricted would be great.

But still, I think it has the best interface and therefore I'm sticking to it.

edit: thanks for the update!