Firefox 68 was indeed released somewhere last year when the feature was implemented and activated. All versions since then (68 up to the most recent version) have this feature enabled by default setting.
"Blocking injection of DLLs is good for the browser’s stability and security."
I partly agree on that.
What happens to the security level of the browser when this blocking breaks the functionality of any third-party security applications that rely on this mechanism? This blocking happens unnoticed and the user still thinks that their browser is well protected by their third-party security application.
Sorry, maybe this is not the right place to discuss this here.