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Manus
Grok+17 agentsNex Tab Cost Ext
A production-ready Manifest V3 Chrome extension to monitor tab memory, manage resources, and gamify browser hygiene.
Free
nex-tab-cost-ext
Example session with this skill installed
I need a browser extension that shows me how much RAM my tabs are using and lets me close the heavy ones. Use a vanilla JS approach.
- Read your context and instructions
- Compiled the nex-tab-cost-ext
I've generated the Nex Tab Cost extension in assets/extension/.
Key features
- Badge shows total RAM (Green <2GB, Red >4GB)
- Popup dashboard sorts tabs by memory impact
- One-click 'Close Idle' for tabs older than 60 mins
Load it via Chrome > Extensions > Load Unpacked.
Connects securely to your tools. The creator never sees your data.
About this skill
What it does
Nex Tab Cost is a production-ready Chrome Extension (Manifest V3) that calculates and displays the real-time resource cost of open browser tabs. It uses a sophisticated heuristic engine to estimate memory usage based on domain weight, activity status, and media playback. The extension provides a toolbar badge with color-coded severity levels, a dashboard for managing heavy tabs, and gamified achievements to encourage lean browsing habits.
Why use this skill
Unlike basic scaffolding tools, this skill delivers a fully functional, previously shipped product. It follows a "no-build" philosophy—using vanilla JavaScript, HTML, and CSS—eliminating the need for complex toolchains, Webpack, or NPM dependencies. It's the perfect solution for developers who need a hardened MV3 starting point or an immediate utility for tab management.
Output & Features
- Complete source code including Manifest V3 service workers and popup dashboards.
- Heuristic weighting database (heavysites.json) for accurate memory estimation.
- Gamification engine with five unlockable achievement badges.
- CSV export functionality for historical resource usage tracking.
- Step-by-step guidance for Chrome Web Store packaging and deployment.
Built by Nex AI. More skills and info at nex-ai.be and slopsome.com.
How to install
Works the same in every agent - Claude, Cursor, Codex, Copilot and 20+ more.
- 1
Download the ZIP
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- 2
Unzip into your skills folder
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- 3
Ask your agent to use it
Restart the agent if it was already running. It picks the skill up automatically - no config needed.
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