Hello.
Chrome for Desktop 80 was released on the 5th Feb.
Release schedules of Chrome browser
You can see the schedules below.
https://www.chromestatus.com/features/schedule
Chrome 80
You can see the release notes of chrome browser. Remember you should find the title of "Stable Channel Update for Desktop" because the other product channel's one is also listed.
https://chromereleases.googleblog.com/
When it comes to the release note of Chrome 80, here is a url.
https://chromereleases.googleblog.com/2020/02/stable-channel-update-for-desktop.html
Acording to the page above, there are few text about functional changes instead of a number of security fixes.
For developer, here is a index page of reports about Chrome 80.
https://developers.google.com/web/updates/tags/chrome80
Then, this is a new in chrome 80.
https://developers.google.com/web/updates/2020/02/nic80
This is a report about JavaScript engine changes.
https://v8.dev/blog/v8-release-80
This is a CSS/JS Platform API changes.
https://www.chromestatus.com/features#milestone%3D80
This is a report about the removed or deprecated things.
https://developers.google.com/web/updates/2019/12/chrome-80-deps-rems
Some new limitations for pageloading with javascript were added inChrome 80. When a page is being closed, window open function or syncronus XMLHttpRequest will not work.
Pickup for webclass
Acording to the release notes, I think there are nothing special of changes to prepare for using webclass.