I will build a custom chrome or firefox browser extension

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shuchirj
S
shuchirj
Shuchir J

About this gig

Need a browser extension that actually works and ships to the Chrome Web Store or Firefox Add-ons?


I'm a software developer who has built and published extensions to both stores. My extension Download Buddy is live on the Chrome Web Store and Firefox Add-ons, so I know the full pipeline: development, manifest configuration, store submission, and review navigation.


What I can build:

  • Page modifiers (content scripts, DOM manipulation)
  • Popup UIs with settings and storage
  • Background service workers and event listeners
  • API integrations and data fetching
  • Tab/URL management and automation
  • Cross-browser support (Chrome, Firefox, Edge)

All packages include:

  • Manifest V3 compliant code (Chrome's current standard)
  • Clean, documented code
  • Source files (.zip ready for store upload)


Premium package also includes:

  • Chrome Web Store submission on your behalf
  • Post-launch support for store review issues


I write clean, modern Manifest V3 code, not the outdated MV2 tutorials floating around online. If you have an old extension that broke after Chrome's MV2 deprecation, I can migrate it too.

Get to know Shuchir J

Shuchir J

Developer Engineer

  • FromUnited States
  • Member sinceMay 2026
  • Languages

    English, Hindi
I am a developer and engineer with 5+ years of experience in full-stack software development, reverse engineering, custom hardware development, and game design.