I use this (https://github.com/astoff/devdocs.el) emacs package to download devdocs locally and access them from emacs, which is pretty great.
I didn't know zeal was being updated at all since the last "release" is almost 5 years old.
I recently discovered devdocs.io and the emacs integration[1] and like it so far.
What is your relationship with devdocs.io, if any?
I have editor integration to that for my editor with https://github.com/astoff/devdocs.el.
If you're unaffiliated, then you'll benefit from changing your name.