Helps web developers quickly visualize the box model, layout structure, and nesting hierarchy of HTML elements to debug CSS layout issues without using browser DevTools element inspector

User installs the extension, navigates to any webpage, clicks the Pesticide toolbar icon to inject colored outlines and background tints onto all elements. The icon state changes to indicate active status. Clicking again removes all injected styles. No configuration or account needed.

Target users: Web developers debugging CSS layouts / Students learning HTML/CSS (originally created for Angela Yu's Web Development Bootcamp)

Extension is extremely small and simple (2 text source files totaling ~5KB), making analysis straightforward with very high confidence

Monetization

No paid features detected

The extension is completely free with no premium features, no payment processing, no upgrade prompts, no billing APIs, and no gated functionality. The keyword matches for 'license' and 'pro' are false positives (MIT License declaration in README.md and a base64 hash in verified_contents.json). The extension is a simple toggle tool with no tiers.

Confidence: 100
Payment platform: --
Source: AI / High
Login required: No
Reason: The extension has no authentication, no account system, no external service login. It operates entirely locally by toggling CSS injection on the current page with a single icon click. No login UI or auth flow exists in any source file.

Permission risk

Medium-risk permissions

This estimate uses declared permissions and host permissions to assess access scope and sensitivity.

扩展能力较强：activeTab、scripting

Publisher

londonappbrewery

Owner

Email: [email protected]
Phone: --
Address: International House 24 Holborn Viaduct London, City of London EC1A 2BN United Kingdom

Public contact fields are shown above. Developer portfolio pages are available on paid accounts.

View developer portfolio

Permissions

Host access