flowerred

I realize I'm replying to an old post, but someone else may find this helpful if they run into the same issue. I ran into this and simply decided to remove and recreate the container. In the process I found that when I installed Grafana, it took over the default Firefox container port (3000). Likely the simplest solution to this issue is to review the docker allocations and assign Firefox to an unused container port. For background, I hadn't noticed this conflict because Firefox is only run when I specifically need it, so Grafana didn't raise any errors when it was installed. I ran into the Firefox error today when I tried to start that container for the first time in weeks. Cheers.