Blog
Developer insights, tips & tutorials
Practical guides on debugging, performance, design tooling, and getting the most out of onHover. Each post covers a real developer workflow — from spotting memory leaks to testing on slow networks. Written by the team that builds the tools, so you get insights that come from daily use, not from theory.
Every article starts from a real problem — something that came up during extension development, a question from a user, or a pattern we noticed being asked about repeatedly. We write about what actually works in practice, with specific steps and real code examples rather than high-level overviews.
- onHover vs Inspect Element: Which Tool Should You Reach For First?Extension Guide
onHover vs Inspect Element: Which Tool Should You Reach For First?
Chrome's Inspect Element is powerful but slow for everyday tasks. onHover now covers CSS inspection, DOM tree, JS debugging, CPU profiling, memory snapshots, SEO, screenshots and more — all without opening DevTools.
10 min readSRSourabh R.
Jun 5, 2026
- Hoverify vs onHover: Which Developer Chrome Extension Should You Use?Extension Guide
Hoverify vs onHover: Which Developer Chrome Extension Should You Use?
Both Hoverify and onHover put developer tools into a Chrome extension popup. But they solve different problems for different workflows. Here is how they compare.
8 min readSRSourabh R.
May 23, 2026
- Test API Endpoints Directly From Your Browser — No Postman NeededDeveloper Tips
Test API Endpoints Directly From Your Browser — No Postman Needed
Switching apps to fire a quick API request breaks your flow. onHover's API Tester lets you send GET, POST, PUT, and DELETE requests — with custom headers, auth, and a full response viewer — without leaving the page.
6 min readSRSourabh R.
May 7, 2026
- Extract Emails, Tables, and Full Pages From Any Website in One ClickExtension Guide
Extract Emails, Tables, and Full Pages From Any Website in One Click
Web pages are full of structured data trapped in HTML. onHover's Extract & Export tool turns tables into CSVs, pages into Markdown or Word docs, and surfaces every email address — instantly.
5 min readSRSourabh R.
May 1, 2026
- Inject CSS and JavaScript Into Any Page Without a BackendDeveloper Tips
Inject CSS and JavaScript Into Any Page Without a Backend
Prototype UI changes on live sites, debug production-only bugs, and suppress distracting UI with persistent per-host scripts — all without a deploy or a browser reload.
6 min readSRSourabh R.
Apr 26, 2026
- How to Extract Every Image, SVG, and PDF From Any WebsiteExtension Guide
How to Extract Every Image, SVG, and PDF From Any Website
Every site's assets are hiding in plain sight — scattered across network requests, CSS, and iframes. Here's how to surface them all in one panel and download exactly what you need.
5 min readSRSourabh R.
Apr 22, 2026
- One Toggle That Makes Every Image, Video, and iframe VisibleDesign Tools
One Toggle That Makes Every Image, Video, and iframe Visible
Layout audits are slow when you have to hunt for media elements manually. The Image Outliner draws color-coded borders around every image, video, canvas, SVG, and iframe on the page — instantly.
5 min readSRSourabh R.
Apr 20, 2026
- How to Inspect & Edit CSS Without Ever Opening DevToolsExtension Guide
How to Inspect & Edit CSS Without Ever Opening DevTools
Most developers reflexively hit F12. But with the right workflow, you can inspect, tweak, and copy CSS directly on the page — faster and with less friction.
5 min readSRSourabh R.
Apr 18, 2026
- Core Web Vitals Explained: LCP, CLS, INP & FCP in Plain EnglishWeb Performance
Core Web Vitals Explained: LCP, CLS, INP & FCP in Plain English
Google's performance metrics sound intimidating. Here's what LCP, CLS, INP and FCP actually mean for your users — and how to fix them fast.
8 min readSRSourabh R.
Apr 12, 2026
- Color Contrast & WCAG: A Practical Guide for DevelopersDesign Tools
Color Contrast & WCAG: A Practical Guide for Developers
Accessibility isn't optional — it's good engineering. Learn how contrast ratios work, what AA vs AAA means, and how to audit your site in seconds.
6 min readSRSourabh R.
Apr 5, 2026
- Debugging Console Logs Inside iframes: The Complete GuideDebugging
Debugging Console Logs Inside iframes: The Complete Guide
Logs from embedded iframes are notoriously hard to catch. Here's the approach we use in onHover to bridge logs across frame boundaries using postMessage.
7 min readSRSourabh R.
Mar 28, 2026
- The 2026 SEO Meta Tags Checklist Every Developer Should KnowDeveloper Tips
The 2026 SEO Meta Tags Checklist Every Developer Should Know
Title tags, OG images, canonical URLs, structured data — a comprehensive checklist you can run on any page in under 2 minutes.
5 min readSRSourabh R.
Mar 20, 2026
- Why You Should Test on Slow Networks (And How to Do It)Web Performance
Why You Should Test on Slow Networks (And How to Do It)
Your site loads in 400ms on your laptop. On a 3G connection in India it takes 8 seconds. Here's how to test — and fix — real-world loading performance.
6 min readSRSourabh R.
Mar 12, 2026
- Full-Page Screenshots Without Browser Extensions Cutting Off ContentExtension Guide
Full-Page Screenshots Without Browser Extensions Cutting Off Content
Native browser screenshots miss fixed headers, sticky navbars, and lazy-loaded images. Here is the right way to capture a full page exactly as users see it.
5 min readSRSourabh R.
Mar 5, 2026
- How Tech Stack Detection Actually Works Under the HoodDeveloper Tips
How Tech Stack Detection Actually Works Under the Hood
How does a browser extension figure out if a site is built on Next.js, uses Cloudflare, or runs on AWS? The signals are hiding in plain sight.
6 min readSRSourabh R.
Feb 25, 2026
- The Responsive Design Testing Workflow That Saves HoursDesign Tools
The Responsive Design Testing Workflow That Saves Hours
Resizing your browser window is not a testing strategy. Here is a repeatable workflow for catching responsive bugs before they reach production.
7 min readSRSourabh R.
Feb 15, 2026
- Finding JavaScript Memory Leaks Without a ProfilerDebugging
Finding JavaScript Memory Leaks Without a Profiler
Memory leaks are silent killers. Your app feels sluggish after 20 minutes and you have no idea why. Here are the patterns to look for and how to find them fast.
9 min readSRSourabh R.
Feb 5, 2026
- CSS Custom Properties as Design Tokens: A Complete Setup GuideDesign Tools
CSS Custom Properties as Design Tokens: A Complete Setup Guide
Design tokens bridge the gap between Figma and code. Here is how to set up a CSS custom property system that scales with your team and stays in sync.
8 min readSRSourabh R.
Jan 28, 2026
- Manifest V3: What Changed and How We Adapted onHoverExtension Guide
Manifest V3: What Changed and How We Adapted onHover
Chrome forced every extension to migrate to Manifest V3. Here is what actually changed, what broke, and the patterns we used to rebuild onHover on the new architecture.
10 min readSRSourabh R.
Jan 18, 2026
What we write about
Every post falls into one of these four areas. Use the category filters above to narrow down by topic, or browse everything in the feed.
Debugging
Techniques for tracking down JavaScript errors, memory leaks, iframe boundary issues, and network failures. Guides in this category focus on the fastest path from symptom to root cause — using browser tools and the onHover Console Panel to surface problems that are otherwise invisible in the default DevTools context.
Performance
Deep dives into Core Web Vitals, network throttling, image optimization, and rendering bottlenecks. Each post explains what the metric measures, how to measure it accurately in a real browser under real conditions, and what concrete actions move the score in the right direction on a production site.
Design & CSS
Walkthroughs for inspecting and editing CSS live in the browser, working with design tokens across Figma and code, testing responsive layouts across device viewports, and auditing color contrast for WCAG accessibility compliance — written for developers who work closely with design systems.
Extension Guide
How browser extensions are built, what the Manifest V3 migration changed and why it broke certain patterns, and how onHover uses extension APIs to deliver dev tools without requiring DevTools to be open. Useful background if you build or maintain browser extensions yourself.