awesome work! dillo used to be my standard documentation browser when projects started using html for their docs, it was snappy and opened files almost instantly
[1]: https://github.com/dillo-browser/dillo-plugin-man
More plugins: https://dillo-browser.github.io/index.html#plugins
On the man plugin, for the users with mandoc/mdoc, I found a bug, '-T html' should be '-Thtml' without spaces. Then works fine.