**Major features:**
* New and improved HTML exporter (easier to extend and more compliant to W3C standards)
* JATS exporter: native bibliography exporter that is not reliant on CSL so that we can export all the fields requested by users
* Bibliography: original language/place/date and short title field.
* Backend: support for Django asynchronous views (replacing tornado proxy views) to slowly remove dependency on Tornado.
* Backend: Django 3.2 => 4.1
* Frontend: replaced offline-plugin with workbox
* Book plugin: Per book language setting.