You will get a great Chrome, Firefox & Safari Browser Extension
Top Rated
Top Rated
Project details
A browser extension is small in size but not in risk: one rejected store review or one small bug can sink the whole product. I build extensions to hold up under real store scrutiny and real usage, not just demo well once.
300+ extensions shipped across Chrome, Firefox, and Safari. Automation tools, productivity utilities, data collection systems, and extensions with full backends: APIs, databases, login systems, payment processing, and admin dashboards if needed.
The work is built to be correct first: clean manifest structure, store-policy compliance checked before submission, and a codebase that won't need a rewrite the first time Chrome changes its extension platform. Cross-browser builds from a shared codebase where feasible, so you're not paying for three separate projects when one well-architected will do.
Every project starts with a short scoping message before any payment: what the extension needs to do, which browsers matter, and any store policy risks worth flagging upfront. This catches problems before they cost you a rejected submission or a rebuild.
I am included in 3 of the "The Best Developers" lists including "The Best Chrome Extension Developers".
300+ extensions shipped across Chrome, Firefox, and Safari. Automation tools, productivity utilities, data collection systems, and extensions with full backends: APIs, databases, login systems, payment processing, and admin dashboards if needed.
The work is built to be correct first: clean manifest structure, store-policy compliance checked before submission, and a codebase that won't need a rewrite the first time Chrome changes its extension platform. Cross-browser builds from a shared codebase where feasible, so you're not paying for three separate projects when one well-architected will do.
Every project starts with a short scoping message before any payment: what the extension needs to do, which browsers matter, and any store policy risks worth flagging upfront. This catches problems before they cost you a rejected submission or a rebuild.
I am included in 3 of the "The Best Developers" lists including "The Best Chrome Extension Developers".
Programming Languages
PHP, HTML & CSS, JavaScriptCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, DesignWhat's included
| Service Tiers |
Starter
$600
|
Standard
$1,500
|
Advanced
$6,000
|
|---|---|---|---|
| Delivery Time | 14 days | 21 days | 30 days |
Number of Revisions | 2 | 4 | 6 |
Number of Pages | 1 | 3 | 6 |
Design Customization | |||
Content Upload | - | ||
Responsive Design | |||
Source Code |
36 reviews
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IJ
Inder J.
Jun 17, 2026
debug and provide solution
Great in debubugging
DE
Danny E.
Sep 28, 2025
Modifying custom Chromium build to "remove properties from Document, Navigator, Window" at runtime
As a developer with some experience, I can confirm this freelancer demonstrates some technical knowledge. However, there were serious time padding issues. Initially tried to bill 5.5 hours for what amounted to adding some lines of code (some logs, simple if condition and random number) to generated files - an approach he himself acknowledged was just for PoC and a bad idea. Notably, he sent me the target file before the contract even started, meaning the work location was already identified. The code style and the explanatory comments suggest AI assistance, which is fine but shouldn't justify additional billable hours. When challenged, he reduced it to 2 hours, still generous for the actual effort. Future clients should closely monitor time logs and verify actual work complexity.
EC
Eitan C.
Sep 26, 2025
Chromium Consultant - Review and Feedback
Naeem is very nice and is hard working. will get the job done.
PA
Pill A.
Mar 13, 2025
30 minute consultation
HB
Hassane B.
Feb 12, 2025
Custom browser for android
About Muhammad Naeem
Chromium Engineer | AI Integration | Anti-Detect Browsers | 100X Dev
95%
Job Success
Lahore, Pakistan - 2:59 am local time
Engineered 30+ custom Chromium browsers from source, including fingerprint spoofing and anti-bot bypass work
Built AI agents, RAG platforms, and LLM integrations for SaaS, security, and automation products (FlowX, Mira, Campaign AI, AI MDR)
Also ship Chrome, Safari, and Firefox extensions when a project needs one
Rescued 3+ projects abandoned by other teams after $45,000+ in failed spend, delivered in 1 to 3 weeks which is up-to 100X faster.
Recognized as:
The Best Chromium Browser Specialist, Upwork
The Best Chrome Extension Developer, Upwork
The Highest Ranked Extension Developer, Fiverr
The Best Software Cracking & Reverse Engineering Expert
The Best Chrome Extension Developer, Fiverr
Top Rated Plus, Upwork
80% Re-Hire Rate, Upwork
BizCom Fiesta Software Exhibition Award
Proof I Deliver 100X faster:
Browser abandoned after $15,000 and 3 months. Delivered in 3 weeks
Browser abandoned after $30,000 and 6 months. Rebuilt from zero in 1 week
Mobile app stuck for 2 months. Fixed in 4 days
What I build:
Chromium and CEF level browser engineering for enterprise, kiosk, and privacy use cases
AI agents and multi-agent systems, RAG pipelines, custom LLM SaaS platforms
AI integration into existing products: security tools, browsers, dashboards
Anti-detect and anti-fingerprint browsers: canvas, WebGL, WebRTC, audio context masking
Browser extensions across Chrome Web Store, Safari App Extensions, and Firefox Add-ons
Why Me?
Most AI developers wrap an API. I build the agent, the RAG layer, security, and integrate it into your actual product, including browser level if needed.
They quote days but deliver in months or never deliver.
I work inside Chromium and CEF source, not just extension APIs
Full source code, logins, and documentation handed over, no lock-in
All Expertise:
🌐 Chromium & Brave based Browser Development, Chrome, Firefox, Safari Extensions
💻 Desktop Development
📱 Mobile Development
🚨 Security Systems Development, Patches, Bypasses
🧠 AI Agents, RAG and LLM Development & Training
🌐 Web Development
⚙️ OS & System Software Development
I deliver up to 100x faster than teams that quote weeks and then take years. Let's get started.
Steps for completing your project
After purchasing the project, send requirements so Muhammad Naeem can start the project.
Delivery time starts when Muhammad Naeem receives requirements from you.
Muhammad Naeem works on your project following the steps below.
Revisions may occur after the delivery date.
Discuss Project
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