How to Watch Apple's Live Stream From WWDC 2015

Apple's World Wide Developer Conference is about to get started beginning with what will likely be a jam-packed keynote full of updates from Tim Cook and other executives.
The live stream is set to begin at 10 a.m. PT, but as Apple's streams are always a big draw (and have been known to have technical problems in the past) it's always a good idea to get your setup ready at least a few minutes before the start of the keynote.
As with previous years, Apple's live stream is limited to those watching on Safari's desktop or mobile browsers or on an Apple TV. On desktop, the video requires Safari 6.0.5 or later on OS X 10.8.5 or later while on mobile it supports Safari on iOS 6.0 or later. Second and third generation Apple TV devices, with software 6.2 or later, are also supported.
If you don't use Safari, or have a compatible iOS device, you're not completely out of luck. You can switch your user agent settings, which basically "trick" websites into thinking you're using a different browser.