PDFObject 2.3.0 has been released and is available immediately on NPM and related CDNs. It continues to support all major browsers (even that pesky little IE11).
There are quite a few improvements in 2.3, including switching to a pure iframe solution for more robust cross-browser support, and improved handling of PDF Open Parameters. See the changelog for more details.
I’ve also revamped pdfobject.com. It now features more thorough documentation and examples. Thanks to its new VitePress backend, it should load quickly and is fully searchable. The new Browser Support page goes into great detail about which browsers support inline PDFs, as well as a handy reference table for checking which PDF Open Parameters are supported in each major browser platform.