You can use Alexa through your browser. Amazon’s AVS cloud services are now available to access through Reverb. AVS is Amazon’s cloud service that allows Alexa to be accessed through a web browser on macOS or Windows operating systems. You can talk to Alexa to play music, ask questions, get news and use your installed Echo Skills… More at Reverb.
It worked OK for me, but some connection problems lessened the experience somewhat.