Extended DevTools

by sab · Developer Tools

Manifest V3 Free

View in Chrome Web Store Data as of 15 Oct 2026

A suite of browser DevTools utilities: Data Layer Inspector, Font Checker, and JS toggle.

Users

0 in 30 days

Rating

0.0 / 5

unchanged in 30 days

Ratings

0 in 30 days

Store rank

#372K

#279K among extensions

Version

1.0.0

updated 13 Feb 2026

Users

monthly, 8 months

Latest, 15 Oct 2026: 1 usersMove the mouse over the chart for any month

Ratings count

monthly, 8 months

Latest, 15 Oct 2026: 0 ratingsMove the mouse over the chart for any month

The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.

About Extended DevTools

Extended DevTools adds three utilities to your browser: Data Layer Inspector Opens a panel in DevTools (F12) that reads window.adobeDataLayer and displays it as an interactive, collapsible JSON tree. The panel auto-refreshes every second and only re-renders when data changes. You can copy the full JSON to your clipboard or reset the data layer directly from the panel. Font Checker Select any text on a page, right-click, and choose "Check Font" from the context menu. A popup shows the computed font properties — rendered font, font family stack, size, weight, style, line height, color, letter spacing, text transform, text decoration, font variant, and font stretch — along with a live styled preview of the selected text. JavaScript Toggle Click the toolbar icon to disable or enable JavaScript on the current tab. The icon reflects the current state. Useful for testing progressive enhancement and no-JS fallbacks. All processing happens locally in your browser. This extension does not collect, store, or transmit any data.