ประสิทธิภาพ

Draw freehand annotations on the active page with a local overlay. Pro saves presets, history, and ExtHub sync.

Toggle a print-media preview overlay to spot print-only and screen-only issues. Pro saves presets, history, and ExtHub sync.

Inventory scripts and stylesheets on the active page with transfer size hints. Pro saves reports, export, and ExtHub sync.

Save and restore scroll position per page URL locally. Pro saves presets, history, and ExtHub sync.

RSVP speed-reading for selected page text or pasted text in the popup. Pro saves snippets, extra format options, and ExtHub sync.

Estimate Core Web Vitals-style metrics (LCP, CLS, resources) on the active page. Pro saves reports, export, and ExtHub sync.

Inventory data-* attribute keys used on the current page. Pro saves reports, export, and ExtHub sync.

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.

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