Marketing & growthX · @btohtoh
Bring back quick X threads with a vibe-coded Chrome extension
Missing X's old "+" button for threading, a user vibe-coded a Chrome extension that lets him write threads quickly again.
See pricing page1 hourBeginner
How to build a Chrome extension with AI
Short answer: Ask Claude Code, Codex or Cursor for a Manifest V3 Chrome extension and describe exactly what it should do on which sites. Load the folder at chrome://extensions with Developer mode on and "Load unpacked", test, and ask the agent to fix whatever breaks. Builders below made ad skippers for Netflix, HBO Max and Disney+ in about 5 minutes, a Grammarly replacement, a translate-on-highlight tool with a vocabulary bank and a watch-party extension synced over WebSockets. Publishing on the Chrome Web Store needs a one-time $5 developer registration and a review. Request only the permissions and sites the extension needs, and keep any API keys out of the extension code.
Browser extensions builders made by prompting coding agents, from a 5-minute streaming ad skipper to a published Web Store extension used in several countries. 16 matching use cases below, each with a public source.
Looking for something else? Search all 1448 use cases or .
Get started in 3 steps
- Describe the job, the exact sites it runs on and what the user clicks, and ask for a Manifest V3 extension with the fewest permissions.
- Load it unpacked at chrome://extensions, test on the real sites, and paste any console errors back to the agent.
- Before publishing ($5 one-time Web Store fee), have the agent write a privacy note and move API calls behind your own server or the user's own key.
Personal & lifeX · @CharlieGoes2War
Build a browser extension to review and bulk-delete your old X posts
Over two weeks he built a browser extension that scans your X account so you can review and delete posts, something companies charge for.
See pricing page2 weeksIntermediate
Dev & opsX · @burntflashlight
Build a Chrome extension that grades your code with a fast model
A developer vibe-coded a Chrome extension that sends code to a fast "system 1" model (Mercury) through your own OpenRouter key and returns notes on approach, efficiency and code style.
Free tier1 dayIntermediate
Vibe coding & appsX · @sahilxdev
Watch movies in sync with a partner using a vibe-coded Chrome extension
A developer vibe-coded a Chrome extension that keeps video playback perfectly in sync between him and his girlfriend through a WebSocket server.
See pricing page1 weekendIntermediate
Research & learningX · @therahuldapp
Train a game bot and ship it as a Chrome extension with WebAssembly
A developer built a Pile-Up Poker (Puzzmo) bot scoring about 6,900 points a game. He tried 6 agent families, picked expectimax plus a value net, made it 1,450x cheaper with beam search and distillation and shipped it as a Chrome extension running in WASM.
See pricing pageWeeksAdvanced
Automation & businessX · @Ananth7e
Have Claude Code email you files from your PC while you are on your phone
Away from his desk, a user asked Claude Code to mail him two videos sitting on his PC. Its Chrome extension wasn't connected and Codex's computer-use tool kept failing, so Opus 5.5 wrote its own small computer-use script in Python and drove the desktop to send them.
$17/moMinutesIntermediate
Dev & opsX · @tudorxjh
Build a Chrome extension that collects agent skills from any site
A developer built a Chrome extension that detects agent skills in marketplaces and repos, lets you tag and edit them and drops them into your AI chats. He asked Codex to make the isometric animation for the detection step.
Free tierDaysIntermediate
Personal & lifeX · @Carter_Shade
Vibe-code a Chrome extension that mutes ads on HBO Max
A viewer tired of political ads vibe-coded a Chrome extension that automatically mutes ad breaks on HBO Max.
See pricing page30 minutesBeginner
ChromeAI coding agent
Personal & lifeX · @Wonster141539
Vibe-code a translate-on-highlight Chrome extension with a vocabulary bank
Floator translates highlighted text in a card under the sentence, lets you chat with AI about it and saves words to a local vocabulary bank with pronunciation and the source sentence. Bring your own API key or a local model via LM Studio or Ollama.
See pricing pageWeeksIntermediate
Vibe coding & appsX · @Ldnbox
Replace Grammarly with your own Chrome extension built with Opus
A user vibe coded a Chrome extension with Claude Opus 5.5 that does the writing checks he was paying Grammarly for.
$4 in / $20 out per 1M tokens1 afternoonBeginner
Vibe coding & appsX · @vipinxtwt
Vibe-code a Chrome extension in a weekend and publish it to the Web Store
A builder vibe-coded a Chrome extension over one weekend and published it on the Chrome Web Store.
See pricing page1 weekendBeginner
Personal & lifeX · @tomjacquesson
Vibe-code a Chrome extension that skips ads on streaming sites
A user vibe-coded a Chrome extension that skips ads on Netflix, HBO Max, Disney+ and other streaming sites.
See pricing page5 minutesBeginner
ChromeAI coding agent
Personal & lifeX · @stevekrouse
Make a new-tab Chrome extension for notes backed up to Val Town
The Val Town founder vibe-coded a new-tab Chrome extension: start typing and you're writing notes, which back up to Val Town. He uses it on calls to fiddle without getting distracted.
See pricing page1 hourBeginner
Personal & lifeHacker News · danielpetho
Filter engagement bait and politics from your X feed
Used an LLM to detect and hide engagement bait and political posts on his X timeline.
See pricing page1 dayIntermediate
Research & learningHacker News · zxdc7896
Summarize articles and YouTube videos with a fully local browser extension
Apogee rebuilds Mozilla's discontinued Orbit summarizer so nothing leaves your machine: it connects to a local Ollama instance (or WebGPU/Transformers.js in the browser) to summarize articles, websites and YouTube videos.
See pricing page1 monthIntermediate
Creators & videoX · @homoky
Make launch animations for your product in code
Shipped a browser extension and made a 17-second animation of the old popup turning into the new one to announce it.
$17/mo1 dayIntermediate
Common questions
- How do you build a Chrome extension with AI?
- Ask Claude Code, Codex or Cursor for a Manifest V3 Chrome extension and describe exactly what it should do on which sites. Load the folder at chrome://extensions with Developer mode on and "Load unpacked", test, and ask the agent to fix whatever breaks. Builders below made ad skippers for Netflix, HBO Max and Disney+ in about 5 minutes, a Grammarly replacement, a translate-on-highlight tool with a vocabulary bank and a watch-party extension synced over WebSockets. Publishing on the Chrome Web Store needs a one-time $5 developer registration and a review. Request only the permissions and sites the extension needs, and keep any API keys out of the extension code.
- Which AI tools do people use to build a Chrome extension?
- Across the 16 sourced use cases in this guide, the most used tools are Chrome, AI coding agent, Claude Code, Claude Opus 5.5, OpenAI Codex.
- How much does it cost to get started?
- 2 of the 16 use cases can start on a free plan. The most common paid starting price is $17/mo (2 use cases). Prices come from each tool's official pricing page.
- How long does setup take?
- 5 of the 16 use cases list a setup time of an hour or less. Each card shows the setup time the builder reported.
- Are these real examples?
- Yes. Every use case links to its public source (an X post, a Hacker News thread or a GitHub repo) with the author and date, so you can check it yourself.
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