Open In All Containers is a lightweight Firefox extension designed for users who work with Firefox Multi-Account Containers.
The extension allows you to instantly open any URL across all your existing Firefox Containers with a single click.
Features: - Open custom URLs in all containers - Open the current active tab in all containers - Prevent duplicate tabs inside the same container - Focus existing tabs instead of opening duplicates - Lightweight and fast - Modern dark mode interface - Works fully offline - Compatible with Firefox Multi-Account Containers
Useful for: - Bug bounty and security research - Multi-account workflows - Testing websites in isolated sessions - Developers and researchers
