PC system requirements for a Chrome meeting are minimal. You will be able to comfortably conduct a meeting with an older, or low end desktop or laptop computer, as Chrome is well optimized for the WebRTC video standard.
Firefox does have higher system requirements, and to conduct a meeting from within Firefox you will need a midrange processor, such as an Intel i3 CPU or equivilent, and at least 4GB of RAM.
Note: If you intend on uploading large PDF documents (10mb+) into a meeting, it may cause increased system resource use as the browser processes the document.
You will require a working microphone and/or webcam. Most modern webcam models contain microphones. You can technically conduct meetings without a webcam, and only a microphone device, but for the best meeting experience we advise using a midrange webcam or better.
You will also require a supported web browser, such as Chrome, Firefox, or Internet Explorer 11. Please see this article for more details.