If you updated from 2.3.17 or 2.3.19 (an alias for 2.3.17 in AMO), please see the 2.3.18 release notes as there are many changes.
Notable changes since 2.3.20 (not published):
- fix: comment before
@-moz-documentbreaks the first selector inside if there's no linebreak in-between.
Notable changes since 2.3.18:
- fix #2037: actually patch CSP
- fix #2039: Firefox Android buttons in popup
- fix #2045: multiple comments before
@-moz-document - fix #2060: add attributes in UserCSS config dialog for easier restyling
- you can extract a style from your cloud provider's json file: paste the contents in the editor or import the file in the manager
Full Changelog: v2.3.18...v2.3.20
How to install these releases:
https://github.com/openstyles/stylus/wiki/Install-Stylus-from-GitHub