take screenshots for Vive store

[jvonitter]

Format: PNG Size: 1366 px W x 768 px H

1. content feed page in browser, in the default environment
2. typing into the awesomebar with keyboard up (should show autofill suggestions. type a letter that generates uncontroversial results. "g" is probably pretty safe?)
3. a video playing in "theater mode". use something without text that's visually appealing, maybe this or something else from Mozilla's youtube channel
4. the fxr desktop version of this-

Put screenshots here: https://drive.google.com/open?id=18XMUYOgGgXHVrkArldtgFzpSECGBTSWa