Quite neat, but I had two problems:
1. The naming is confusing, a web interface that lets you browse a particular database is not generally called "a web browser" for that database. A web browser is the actual software you use to access the web.
2. I searched for a (not so) random package [1] and quickly got a bunch of matches. I did not understand the ordering (the latest version number was not on top).
3. When I clicked the first match, I got a "Bad Gateway" error from [2], but I guess it might be squeezed by HN just now.
[1]: https://www.apt-browse.org/search/?query=gentoo
[2]: https://www.apt-browse.org/browse/debian/jessie/main/amd64/g...