Billable Tab Timer for Hourly Freelancers & Consultants — Firefox extension that turns tabs into client hours and invoice-ready CSV (0.1-hour or 15-minute rounding, works offline)

Times the site in front of you, assigns it to a client, rounds it to your billing increment and exports invoice-ready CSV. Stored locally.

What it asks for

• tabs
• storage
• idle

Version 1.0.0 · passes Mozilla’s own web-ext lint with 0 errors.