neowin[.]net/news/edge-100-is-now-available-in-beta-with-a-new-lightweight-pdf-viewer-and-pwa-sync/
2 reasons why I thought it worth posting...
1) Shades of Y2K -- there's been a lot of worry that when browsers reached version 100 it would break the internet -- 3 digits instead of two. Google, Microsoft, & Mozilla have done lots of testing, and they all think it'll be a safe non-event, but just in case they have a Plan B.
2) A feature I'm looking forward to, PDFs will be viewable in File Explorer -- no more having to open a browser or reader.