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📰 Dev.to · SHOTA

48 articles · Updated every 3 hours · View all reads

All Articles 111,006 Blog Posts 121,327 Tech Tutorials 28,291 Research Papers 22,451 News 16,629 ⚡ AI Lessons

Dev.to · SHOTA 🛠️ AI Tools & Apps ⚡ AI Lesson 6d ago

Detecting Which AI Chat Platform You're On: URL and DOM Patterns for ChatGPT, Claude, Gemini, and Copilot

If you're building a Chrome extension that works with AI chat platforms — prompt injection, session...

Dev.to · SHOTA 🌐 Frontend Engineering ⚡ AI Lesson 1w ago

How to Detect Which Font Is Actually Rendering in a Browser (Not Just the CSS Stack)

getComputedStyle(element).fontFamily returns the CSS declaration: "Hiragino Kaku Gothic ProN", "Yu...

Dev.to · SHOTA 1w ago

Scraping Prices Without an API: Chrome Content Script Patterns for Japanese E-Commerce

Japanese e-commerce is fragmented. The same product — a vintage camera, a game console, a brand bag —...

Dev.to · SHOTA 2w ago

Browser Scroll Restoration Is Broken on SPAs. Here's How a Chrome Extension Fixes It.

Chrome has had scroll restoration support since 2015. You can even control it:...

Dev.to · SHOTA ⚡ AI Lesson 2w ago

5 Cookie Tricks for Debugging Auth Issues in Chrome (No More Creating Test Accounts)

Debugging authentication in web apps is painful. You need to test the same flow as five different...

Dev.to · SHOTA 2w ago

Browser Scroll Restoration Is Broken on SPAs. Here's How a Chrome Extension Fixes It.

Chrome has had scroll restoration support since 2015. You can even control it:...

Dev.to · SHOTA 📣 Digital Marketing & Growth ⚡ AI Lesson 2w ago

5 Cookie Tricks for Debugging Auth Issues in Chrome (No More Creating Test Accounts)

Debugging authentication in web apps is painful. You need to test the same flow as five different...

Dev.to · SHOTA 2w ago

5 Cookie Tricks for Debugging Auth Issues in Chrome (No More Creating Test Accounts)

Debugging authentication in web apps is painful. You need to test the same flow as five different...

Dev.to · SHOTA ⚡ AI Lesson 2w ago

5 Cookie Tricks for Debugging Auth Issues in Chrome (No More Creating Test Accounts)

Debugging authentication in web apps is painful. You need to test the same flow as five different...

Dev.to · SHOTA 🔧 Backend Engineering ⚡ AI Lesson 2w ago

Auto-Block Focus Time in Google Calendar — Building a Schedule-Based Chrome Extension

Using chrome.alarms and MutationObserver to inject focus-time overlays on Google Calendar without OAuth or cloud sync.

Dev.to · SHOTA ⚡ AI Lesson 3w ago

I Built a Visa Requirement Overlay for Google Flights — Here's How the Chrome Extension Works

Injecting visa requirement badges on Google Flights using a local JSON matrix, MutationObserver, and multi-selector destination extraction.

Dev.to · SHOTA 📣 Digital Marketing & Growth ⚡ AI Lesson 1mo ago

Building a Japanese-First Read-Later PWA: From Pocket Shutdown to Launch

After Pocket shut down, I built Readbox — a Japanese-first read-later PWA. Notes on Vercel serverless, on-device storage, i18n routing pitfalls.

Dev.to · SHOTA ⚡ AI Lesson 1mo ago

I Applied SLA Concepts to My Email Inbox — Here's What I Learned Building the Chrome Extension

Tracking response time deadlines for emails in Gmail using Chrome MV3, DOM mutation observers, and a color-coded urgency system.

Dev.to · SHOTA ⚡ AI Lesson 1mo ago

190 Countries, Zero API Calls: Shipping Static Data in a Chrome Extension

How I structured and bundled a 190-country visa requirements matrix into a Chrome extension without hitting any external API at runtime.

Dev.to · SHOTA ⚡ AI Lesson 1mo ago

How to detect ghost jobs in 2026 — a developer's guide

Nearly 4 in 10 hiring managers admit posting jobs with no plan to fill them. Here are the four signals I use to detect ghost jobs from a Chrome extension — with

Dev.to · SHOTA 🛠️ AI Tools & Apps ⚡ AI Lesson 1mo ago

Ghost Jobs Are Wasting Your Time — I Built a Chrome Extension to Detect Them

How I detect fake job listings using posting age, description vagueness, and duplicate signals in a Chrome MV3 extension. No API keys needed.

Dev.to · SHOTA 📣 Digital Marketing & Growth ⚡ AI Lesson 1mo ago

How to Avoid Chrome Web Store 'Red Nickel' Rejection: What I Found After Auditing 18 Extensions

I got my Chrome extension rejected from the Chrome Web Store last week for a 4-letter word:...

Dev.to · SHOTA ⚡ AI Lesson 1mo ago

Detecting YouTube SPA Navigation in a Chrome Extension Content Script

How to reliably run code on every new YouTube video — not just on the first page load — using MutationObserver and a URL change guard.

Dev.to · SHOTA 1mo ago

I Built a Price History Tracker for Japan's 4 Major E-Commerce Sites (Amazon.co.jp, Rakuten, Yahoo!, Mercari)

How I scraped price data from 4 different site structures, built a local price history DB with IndexedDB, and created drop alerts — all in a Chrome MV3 extensio

Dev.to · SHOTA 1mo ago

I Built a Chrome Extension That Remembers Where You Stopped Reading

test content

Dev.to · SHOTA 📣 Digital Marketing & Growth ⚡ AI Lesson 1mo ago

Building a Cookie Manager Chrome Extension: What I Learned From the MV3 Transition

Cookie management extensions are one of the oldest categories in the Chrome Web Store. EditThisCookie...

Dev.to · SHOTA 📣 Digital Marketing & Growth ⚡ AI Lesson 1mo ago

Building a Cookie Editor Chrome Extension — Why I Built CookieJar After EditThisCookie Died

EditThisCookie Is Gone — Now What? In late 2024, EditThisCookie — the most popular cookie...

Dev.to · SHOTA 📣 Digital Marketing & Growth ⚡ AI Lesson 2mo ago

Real Numbers: Freemium Chrome Extension Monetization After 6 Months

I've been publishing Chrome extensions for about a year. Six months ago I started adding freemium...

Dev.to · SHOTA 📣 Digital Marketing & Growth ⚡ AI Lesson 2mo ago

Monetizing Chrome Extensions with Freemium — Real Numbers from 7 Paid Extensions

Can You Actually Make Money with Chrome Extensions? Yes. But the numbers are smaller than...