Package PureBrowser: Some Integrated search engines are non-free, such as google, yahoo, amazon, duckduckgo, etc.
Debian tracks creation of package [[https://bugs.debian.org/452422|yacy]].
When done, purebrowser should recommend that package and use it by default when available.
NB! This issue is not about promoted search engine tracking its users (see T156) nor about it serving non-free JavaScript (see T609)