Building browser automation software sounds simple until you start dealing with real-world limitations.
Over the past few months, I've been developing TinyTask Mailer Pro, a Chrome extension that automates Gmail campaigns while keeping the user in control. It integrates Google Sheets, manages campaign progress, supports licensing, and communicates with a Flask backend for usage tracking.
This article isn't about sending spam or bypassing Gmail restrictions. Instead, it's about the engineering decisions, architecture, and lessons I learned while building a production-ready automation tool.
Why Build a Gmail Automation Extension?
Many small businesses, freelancers, recruiters, and sales teams spend hours performing repetitive tasks like:






