The firefox-esr package is in MUCH better shape than chromium on Debian systems. It is up to date. https://tracker.debian.org/pkg/firefox-esr
There hasn't been a new Chromium package in any Debian version (stable, testing or unstable) since May 21. Not great. It's a security mess. https://tracker.debian.org/pkg/chromium
I will be returning Mastodon support to blogPoster. I will not be using the mastodon-api Ruby gem. Instead I will do the posting to Mastodon via the http gem. https://github.com/passthejoe/blogPoster/