# onHover — Developer Toolkit > 25+ dev tools in one click: inspect elements, pick colors, screenshots, API tester, SEO analyzer, fonts & more — no DevTools needed. Canonical page: [https://chrome-stats.com/d/onhover-developer-toolkit](https://chrome-stats.com/d/onhover-developer-toolkit) ## Overview - **ID:** `onhover-developer-toolkit` - **Platform:** Firefox - **Type:** Firefox add-on - **Status:** Available - **Publisher:** onHover - **Category:** web-development,privacy-security,appearance - **Daily users:** 2 - **Version:** 1.0.3 - **Last updated:** 2026-08-22 - **First published:** 2026-06-12 - **Size:** 3.12 MB - **Data as of:** 2026-09-05 - **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/onhover-developer-toolkit/) - **Website:** [https://onhover.in/contact](https://onhover.in/contact) - **Privacy policy:** [https://addons.mozilla.org/firefox/addon/onhover-developer-toolkit/privacy/](https://addons.mozilla.org/firefox/addon/onhover-developer-toolkit/privacy/) ## Description Stop switching tabs. Stop opening DevTools. Everything you need to inspect, debug, and analyze any webpage is one click away. onHover is a developer toolkit that runs directly on any page — no DevTools, no context switching. ━━━ ELEMENT INSPECTOR ━━━ • Hover over any element to see computed styles, dimensions, and box model • Click to pin a detail panel — drag it anywhere on screen • Inspect elements inside iframes • Edit styles and text live on the page • Hide or remove elements without touching the source • Check WCAG contrast ratio and accessibility attributes • Export the inspected element directly to CodePen ━━━ COLOR TOOLS ━━━ • Eyedropper — pick any pixel color in HEX, RGB, or HSL • Color Palette extractor — pull every color used on the current page • One-click copy to clipboard ━━━ SCREENSHOTS & RECORDING ━━━ • Full-page screenshots (stitches content beyond the visible viewport) • Capture a specific element or draw a custom area • Record the active tab as video (with optional mic audio) • Save screenshots and recordings directly to your device ━━━ SEO & META TOOLS ━━━ • Inspect all meta tags, Open Graph, and Twitter Card data • Preview how the page looks in Google, Twitter, and LinkedIn • Audit heading hierarchy (H1–H6) • Scan all links and flag broken or redirected URLs • Analyse semantic elements and structured data ━━━ PERFORMANCE & INSIGHTS ━━━ • Live Core Web Vitals badge (FCP, LCP, CLS, TTFB) on every page • Full page insights: load time, resource breakdown, render-blocking assets • Simulate network conditions: Fast 3G, Slow 3G, Offline ━━━ DEVELOPER DEBUGGING ━━━ • Console panel with network request log — no DevTools needed • API Tester: send GET, POST, PUT, DELETE requests right from the extension • Custom Code Injector: inject persistent CSS/JS into any site • Clear browsing data (cache, cookies, localStorage) for any time range • DOM Tree viewer for quick structure inspection • Redirect Path tracer — follow every hop of a redirect chain ━━━ FORMATTERS ━━━ • Sitemap Formatter: opens any XML sitemap as a clean table with URLs, last-modified dates, and priority scores — instead of raw XML • JSON Formatter: automatically beautifies JSON responses in the browser with syntax highlighting, collapsible nodes, and one-click copy ━━━ FONTS & ASSETS ━━━ • Font Inspector: detect every font on the page with computed styles • Assets Viewer: browse, preview, and download all images, videos, SVGs, and PDFs ━━━ DATA EXTRACTION ━━━ • Table Capture: export any HTML table to CSV • Email Finder: extract all email addresses from a page • Webpage to Markdown: convert any page to clean Markdown ━━━ PRODUCTIVITY ━━━ • Cookie Editor: view, add, edit, and delete cookies • Open Multiple URLs at once • Site Stack: detect the tech stack, CMS, and frameworks a site uses • Built-in todo list that persists across sessions ━━━ NO DEVTOOLS REQUIRED ━━━ Everything runs inside the extension popup or directly on the page — no DevTools panel, no terminal, no extra apps. Works on all websites including localhost, staging environments, and sites behind authentication. ## Rankings - #63,793 — Overall - #65 — developer tools - #72 — eyedropper - #86 — developer - #168 — hover ## Permissions and access ### Permissions - `storage` - `unlimitedStorage` - `activeTab` - `tabs` - `scripting` - `clipboardWrite` - `cookies` - `browsingData` - `tabCapture` - `offscreen` - `downloads` - `debugger` ### Host permissions - `` ### Content script matches - `` ## Safety - **Risk impact:** Very high risk impact - **Risk likelihood:** High risk likelihood ### Analysis details - Allows for debugging of other web apps and extensions, which can intersect with sensitive information and security boundaries. - This extension was recently updated in the past month. New updates may not be stable or safe. > Some risk analysis details are omitted from this free response. 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