Block non .onion requests in TOR Browser

During visiting the onion service of the New York Times (https://www.nytimes3xbfgragh.onion) I experienced, that there is still clear net traffic going on. In the certain example of the NYTimes it is different forms of trackers.

As I consider clear net traffic on a onion service as bug by the website, I thought about why not to block all non onion traffic on .onion sites.

For playing around and checking if that idea breaks the websites I developed a small webextension implementing the described request-blocking: https://github.com/simonfrey/onion-only CC0

The sites I tested work all as expected and are not influenced in a bad UX way. I tried:

• https://3g2upl4pq6kufc4m.onion (DuckDuckGo)
• https://www.nytimes3xbfgragh.onion (NYTimes)
• https://www.bbcnewsv2vjtpsuy.onion (BBC News)
• https://jcw5q6uyjioupxcc.onion/ (Washington Post Secure Drop)

Looking forward to hear thoughts on the idea and if that could be an enhancement landing in the TOR Browser at some point.

Trac:
Username: simonfrey