why does it have picture in picture when it is not described? Version 76 describes picture in picture.

I am running version 75 on a Mac os and it has picture in picture. Looking at the description "https://support.mozilla.org/en-US/questions/new/desktop/privacy-and-security/form?search=picture+in+picture+on+version+75&step=aaq-question" it does not mention anything about picture in picture. What is occurring with my version sha256:0c32745905ee818b635c785466c53c66220c9c0d3fc56dc6613456edb0da03ae why does it have picture in picture when it is not described? Version 76 describes picture in picture.