Free version is out of data and not supported temporariy, full version of extension works great with latest Magento 2 versions and also include our free support - https://firebearstudio.com/improved-configurable-products-for-magento-2.html
Demo - http://magento2demo.firebearstudio.com/
This is a Magento 2 version of our ICP Extension for Magento 1, which improves the default behaviour of Magento configurable products.
Features
- Configurable product options pre-select by simple product URL
- Unique URL for each option combination
- Appropriate product images, descriptions, and titles are used according to selected options
- The ability to replace page URL with selected product option URL on the fly without reloading the page