PR0F0X01_Open-All-Containers by prof

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