After a couple months of inactivity here it is! A new version (yee..)! Still in alpha state (noo..)!
This version should fix #5, introduce new styling in the messages and and extensions panels and hopefully not introduce new bugs.
Have fun and please report any issue here in GitHub! It is of great help for other people that are using this extension.
The preferences panel has been moved outside the preferences window to a separate independent window. So it is not possible to access it the old way anymore (e.g. Menu -> Preferences -> Display -> Arc Integration), meaning that it can only be accessed using the new method: Menu -> Add-ons -> the options button of the extension.