![Firefox logo](https://assets-prod.sumo.prod.webservices.mozgcp.net/media/uploads/products/2020-04-14-08-36-13-8dda6f.png)
A copy of Firefox is already open. Only one copy of Firefox can be open at a time.
How do I fix this problem? I can't use my Firefox browser.
How do I fix this problem? I can't use my Firefox browser.
How do I fix this problem? I can't use my Firefox browser.