I develop custom Chrome extensions that bring a product directly into a browser workflow: inspecting a page, capturing information, testing an interface, or connecting a web service to a task the user already performs. The starting point is a specific user action and an explicit boundary around the data the extension needs.
My extension catalogue includes color picking, scrolling screenshots, font inspection, localization testing, and an interactive browser companion. You can inspect their product pages, screenshots, store links, and privacy documentation below. For a new project, I can work from an idea, an existing extension that needs attention, or a web product that needs a browser companion.
When this service fits
A good fit for focused browser utilities, internal workflow tools, and SaaS companion extensions. Send the target websites, expected user journey, and any API or existing source code so we can establish feasibility before implementation.
What I build
Page inspection tools, capture and export workflows, content enhancements, and productivity interfaces are useful when they remove a repeated manual step. I define the smallest useful workflow first, including empty states, unsupported pages, cancel actions, and recovery when the page changes while the tool is running.
Manifest V3 architecture
An extension has several execution contexts, each with a different lifetime and responsibility. I separate content scripts, service worker logic, and interface code; define message contracts; and make persistent state explicit. Event handlers and resumable work are designed around the service worker lifecycle so essential behavior does not depend on a permanently running background process.
Chrome APIs and integrations
The API plan follows the feature: storage for preferences, scripting for page interaction, context menus for contextual actions, alarms for scheduled work, or an authenticated backend for an account-based product. I document the message boundaries and validate inputs from page contexts. Third-party integrations need explicit behavior for expired sessions, timeouts, and unavailable services.
Popup, side panel, and options UI
A popup suits a quick action; a side panel can support a longer task beside the current page; an options page gives preferences a stable home. I choose the surface around how long the task takes and whether the user needs the page in view. Interfaces include keyboard interaction, readable states, progress feedback, and a clear explanation when access is required.
Permissions, privacy, and security
Every requested permission should correspond to an actual feature. I review host access, consider user-triggered or optional access where appropriate, and identify which data remains on the device or leaves it. The implementation, privacy policy, and store disclosures need to describe the same behavior. Security work includes message validation, safe DOM updates, and avoiding unnecessary exposure of page or account data.
Chrome Web Store release preparation
Release preparation covers the distributable package, manifest, icons, screenshots, feature descriptions, support contact, and privacy disclosures. I review the submitted feature scope against the extension’s behavior and help prepare a reproducible testing path. Chrome Web Store review is controlled by Google; publication timing and approval cannot be guaranteed.
Debugging and maintenance
For an existing extension, I start by reproducing the failure in the right context: service worker, content script, popup, or target website. Common work includes permissions regressions, state synchronization, site changes, and release migrations. A maintenance handover should explain how to build, test, inspect logs, version the package, and recover from a broken release.
What the handover includes
- Source code with a documented build and local installation workflow.
- A permission and data-flow inventory aligned with the agreed features.
- Feature verification, release checklist, and a scoped maintenance handover.
Development process
Validate the workflow
Review the user journey, target websites, data boundaries, and browser limitations. Agree on a small acceptance checklist and resolve uncertain API behavior with a focused prototype.
Build the core interaction
Connect the interface, background events, and page logic with typed contracts. Review a working version before expanding the feature set.
Test access and failure paths
Test supported pages, declined permissions, tab changes, interrupted tasks, and stored data across updates. Check the actual package prepared for release.
Prepare release and ownership
Prepare listing materials and disclosures, record the submission steps, and agree how feedback and future browser or website changes will be handled.
Extensions you can inspect
Relevant portfolio projects
These pages document the products and available project details. They provide context for related workflows; implementation stacks and responsibilities are stated only where documented.
Useful technical guides
Published articles related to the decisions behind this service.
Frequently asked questions
Can you improve an existing Chrome extension?
Yes. Share the source code, manifest, current listing if available, and a reproducible description of the problem. I can assess architecture, UI, permissions, reliability, or release preparation and propose a bounded first change.
Can an extension connect to my existing SaaS?
Yes, when the product exposes suitable APIs and an appropriate authentication flow. We first define which account actions belong in the browser, how sessions are renewed, and what information may be stored locally.
What determines the scope and cost?
The main variables are supported websites, browser surfaces, permissions, external APIs, account features, and testing coverage. A small local utility differs substantially from an authenticated multi-site product. I estimate after reviewing those requirements rather than quoting a universal package.
Do you handle store publishing?
I can prepare the package, listing assets, technical disclosures, and a release checklist, and help address review feedback. You should retain control of the publisher account. Store approval and review duration remain Google’s decision.