A history of backdoors
blog.cryptographyengineering.com
blog.cryptographyengineering.com
https://www.schneier.com/blog/archives/2014/03/friday_squid_...
One person griped that the market could've chosen secure products. That's true. However, Bell (of Bell-Lapadula) noted high security has never spontaneously emerged in marketplace. The incentives go in other direction too much. So, subsidizing high security via DOD purchasing was critical and did result in a number of products appearing. Their canceling that resulted in almost all disappearing with rest barely improving. But, the market's impact on the situation is where it starts and I blame them a large degree in another article (clipped below).
It seems like Google's informal outlook is that they don't want Chrome to cut users off, so they're just going to work with vulnerable sites instead of patching.