Improvements:

- Changes to the behavior of the external content:
  - Introduced External Content Services. This is a powerful new feature that grants websites the full flexibility to the look & feel for the distinct types of external content. For example, you can have a fully customized consent element for YouTube videos and 
other boxes for the rest. Make sure to check it out in our documentation as it really brings our product to the next level.
  - Added the ability to set a specific background image to the external content replacement box for each individual external content element, regardless of service.
  - Added new JavaScript API Events with regards to the external content replacement.
- Added the option to specify a background image to the replacement  globally or individually.
- Added an optional fingerprint icon in the frontend, which allows visitors to open the cookie opt in on demand if they choose to change their preferences.
- Added a new frontend plugin element that lists all your used cookies their descriptive information.

IMPORTANT:

- Dropped the official support for TYPO3 8 and therefore PHP 7.0 and 7.1. Its time for us to move forward.

Bugfixes:

- Improved the Google Lighthouse accessibility test results by moving the cookie consent box in the beginning of the document and adjusting the "tabindex" properly.
- Added "data-nosnippet" to the cookie box to prevent the cookie box from appearing in snippets in the search engine results page.
- Added filtering for the usage statistics so that bots dont pollute the statistics database.

https://www.sgalinski.de/en/typo3-products-web-development/cookie-optin-for-typo3/cookie-optin-release-notes/