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Show screen, viewport, DPR, language, and timezone for this browser. Pro saves reports, export, and ExtHub sync.

Map document language and lang attributes on the current page. Pro saves reports, export, and ExtHub sync.

Collect mailto and tel links from the current page. Pro saves reports, export, and ExtHub sync.

Find target=_blank links missing noopener or noreferrer. Pro saves reports, export, and ExtHub sync.

List preload, prefetch, preconnect, and modulepreload link hints. Pro saves reports, export, and ExtHub sync.

Read the page origin storage estimate from navigator.storage. Pro saves reports, export, and ExtHub sync.

Inspect service worker controller and registrations for the page origin. Pro saves reports, export, and ExtHub sync.

Count how many elements match a CSS selector on the page. Pro saves snippets, extra format options, and ExtHub sync.

List responsive image srcset and picture sources on the page. Pro saves reports, export, and ExtHub sync.

List video elements on the page with source and size info. Pro saves reports, export, and ExtHub sync.