- custom theme support
- syntax highlighted raw markdown view
- pan, zoom and resize mermaid diagrams
- improved settings page
- fix frontmatter being stripped in raw markdown view
- fix anchor icon missing on origins with strict csp
- fix emoji rendered in prism code blocks
- fix omit port when adding an origin
- update mermaid from v9.2.2 to v10.8.0
- update marked from v9.0.3 to v12.0.1

- add markdown-it as default compiler
- add support for markdown extended syntax
- fix auto scroll on very large pages
- fix detect wildcard subdomains in origin
- theme fixes
- new default icon with an overlay
- update marked from v4 to v9

This release is identical to v5.2 it only addresses reviewer feedback.