Tools
Screenshot tools
Four ways to capture a public page. They share one browser lock-down and one quota. Pick the shape of the picture, not a different security mode.
Desktop
1440×900 is the default desktop viewport. Use it for marketing pages and app marketing sites where the layout you review is the wide one. Custom widths up to 1920 are available when a breakpoint sits somewhere else.
Tablet and mobile
Tablet is 768×1024. Mobile is 390×844 with a mobile user agent, so sites that switch on user agent can serve the phone layout. This is still Chromium, not a device lab.
Full page
Full-page mode keeps the width you chose and follows the document down to a hard height cap. Lazy content is nudged with a short, bounded scroll. Infinite pages are cut off and marked as truncated.