No. On page 9, Section 5.1 they state that by default Safari will spawn one process per tab and they provide less consolidation by default than Firefox or Chrom

No. On page 9, Section 5.1 they state that by default Safari will spawn one process per tab and they provide less consolidation by default than Firefox or Chrome. It is only window.open(), which is used to create popups, that was not updated from the old design that did not use isolation to the new model that does support isolation. The "security experts" at Apple were just too incompetent to audit their code base and fix all the known security holes. I mean, this is not exactly shocking coming from the same company with "security experts" that released a version of macOS that allowed anybody to login to root with any password [1]. Their security review process is grossly incompetent. At some point you should stop believing the "security experts" who do the security equivalent of putting antifreeze into the ice cream because they ran out of sugar and the antifreeze tastes sweet so it must work just as well. [1] https://arstechnica.com/information-technology/2017/11/macos-bug-lets-you-log-in-as-admin-with-no-password-required/ https://arstechnica.com/information-technology/2017/11/macos...