Catalogus

Block Threads authors with one click. A small × next to usernames in your feed, with undo.

Strip tracking parameters from URLs and page links. Chrome and Edge.

Speed, skip, and picture-in-picture for page videos. Chrome and Edge.

Pick page elements and export JSON or CSV locally. Chrome and Edge.

Map ARIA roles and landmarks on the active page for accessibility review.

Open many URLs at once from a pasted list — validate, stagger, new window, and saved lists locally.

Find canvas elements on the page and export them as PNG downloads.

List CSS custom properties used on the active page and copy their values.

Discover font families used across elements on the active page.

List iframes on the active page with source URLs and sizes.

Draw freehand annotations on the active page with a local overlay.

Highlight multiple search terms on the page with different colors.

Force the first playing or selected video on the page into Picture-in-Picture.

Toggle a print-media preview overlay to spot print-only and screen-only issues.

Edit query parameters of the active tab URL and navigate to the result.

Inventory scripts and stylesheets on the active page with transfer size hints.

Save and restore scroll position per page URL locally.

Mute every other tab so only the current tab can play sound.

Calculate CSS selector specificity and compare two selectors.

RSVP speed-reading for selected page text or pasted text in the popup.

Track time on site hosts locally — today/7-day views, pause, ignore list, badge, and CSV export.

Generate local time-based one-time passwords from Base32 secrets.

Estimate Core Web Vitals-style metrics (LCP, CLS, resources) on the active page.

Convert between simple YAML and JSON locally in the toolbar.