Contao 4.4.x Remove Prefix .html from url

How to remove (.html ) prefix from Contao url

Example : Currentl Url => http://example.com/startseite.html required url : http://example.com/startseite

You need to add the following to your config/config.yml (app/config/config.yml prior to Contao 4.9).

contao:
    url_suffix: ''

After that, you need to clear and warmup the application cache, as with any configuration changes.