https://www.bleepingcomputer.com/news/software/mozilla-is-working-on-a-chrome-like-site-isolation-feature-for-firefox/

The Mozilla Foundation, the organization behind the Firefox browser, is working on adding a new feature to its browser that is similar to the Site Isolation feature that Google rolled out to Chrome users this year.

For readers who haven't been keeping up with the latest Chrome features, Site Isolation works by opening a new browser process for any domain the user loads in a tab.