Unable to Stream in Browesrs (most recent Firefox and Chromes browsers) on a Windows 10 PC

For the past several months I have been unable to stream in a browser window on a laptop. I have the most recent browsers (firefox/Mozilla and Chrome) but there is still an issue (it just sits on the purple screen of death). During the day, I do not have a device (iPad, tablet, not phone) to use an app for streaming and would like to be able to complete this task on my laptop (preferably in a browser).  I do not want to use resources acquiring a new laptop to stream - as the laptop functions as desired for all other needs. Open to suggestions that hopefully do not require the use of additional monetary resources. I have already lost the ability to control and customize my internet experience in the web browser. Hoping this is not something else that I will be limited in using due to its dependency on device use and access. I am left wondering if xFinity is implying that if you do not have access to a device regularly, you are not their target demographics.