I think the reason this was posted is not because of miscellaneous infrastructure, but that it’s an implementation of an interesting algorithm. If you care enough to leave a comment like this, update it yourself.
So you are claiming the protocol that Signal has adopted is already backdoored by the government. Extraordinary claims require extraordinary evidence. You need to provide some kind of evidence of this. We are talking 20+ years of open and public research on post-quantum cryptography.
I don't think these incentives make sense at all. Government organizations suspected to be developing quantum computers probably have larger annual budgets than 20 billion. The ability to undermine virtually all cryptographic systems is unquantifiably large.
Once the cat is out of the bag, everyone will rush to post-quantum cryptography and all that value will be lost in a relatively short period. Indeed, we already witnessed this in the 2010s following the Snowden revelations when big tech, in a concerted effort, adopted HTTPS. Now that is the standard.
For example, "The Fiscal Year 2022 budget appropriation included $65.7 billion for the National Intelligence Program, and $24.1 billion for the Military Intelligence Program."
The original version was a browser extension. It was very painful to maintain support for all the different types of input fields. Most large social media sites do not use standard text areas.
My friend and I implemented this a couple of years ago. It is no longer maintained but the general ideas still apply. Very few social media sites use standard text areas which makes maintaining compatibility a total PITA.