Open website using Android Webview

I have a custom Rom on my phone and I didn't install Google Chrome; I'm using Firefox instead. However, once in a blue moon there's a site that complains that it doesn't work with Firefox and suggests using Chrome instead. I have Android Webview installed and as far as I know it is a browser engine based on Chromium. I believe that apps that want to show web content use Android Webview for that. Am I right about this? Is there a workaround to open a website using Webview without installing Google Chrome or other browser?