Magento 2 From now all extensions should be installed via the composer.
How can we check the third-party extension in the Magento vendor folder?, while installing Magento 2 then Magento have also lots of different extensions in its vendor folder, so we need to find only third-party extension which is not coming from the default.
For example, we installed 5-8 third-party extensions in Magento, and that extensions are present in the vendor folder or vendor/magento folder but need to find only third-party extensions.