> it would be very helpful if the table of test results were furnished with a glossary that:
There is some explanation for each test -- to see these explanations, you need to click on category titles, test titles, or test results themselves. But I take your point that these annotations need to be expanded and easier to find.
> I tried to send feedback to this effect but could not as I'm not a Twitter user (it seemingly being the only of sending feedback to PrivacyTests.org).
Actually in the upper-right corner of each page there is a link to an email address for feedback (contact@privacytests.org). And github issues are also welcome. I gather these links could be made more clear. :)
> I was rather surprised to see how poorly Tor featured in the tracking department, it failing every test.
The tracking content section results actually stem from Tor Browser's approach: Tor Browser currently does not block any third-party content from loading in a page. Rather it prevents tracking by various policies, including always using the Tor network, providing full state partitioning, and providing strong fingerprinting resistance. Generally speaking, third-party trackers are prevented from tracking users by these measures. However, I think blocking of trackers could offer defense in depth in Tor Browser, in case any of the other measures fails.