We're sorry to hear that Firefox is crashing when you open it. Please do the following to give us crash IDs that will help us understand more about the crash.

1. Click the Finder icon in the dock. On the menu bar, click the Go menu, hold down the option or alt key and select Library. A window will open containing your Library folder.
2. Open the "Application Support" folder, the "Firefox" folder, the "Crash Reports" folder and finally the "submitted" folder.
3. Open the 5 most recent files with a text editor and copy the IDs.
4. Paste each ID with bp- into the reply window on the forums.

Thanks in advance!

You can find more information and troubleshooting steps in the Troubleshoot Firefox crashes (closing or quitting unexpectedly) article.

The most recent crash reports are from 2018. When I attempt to launch Firefox the top menu appears, but is greyed out. From there I can attempt to open a new window, but nothing happens. I have tried to download a new copy, but that changed nothing.

Firefox seemed to be working yesterday morning.

bp-0e11ec47-2acf-4e24-8e01-bd4981180819.txt bp-3e118705-8498-4905-bf62-b4d121180513.txt bp-5a513180-8ccc-462d-823f-7e2631180706.txt bp-5b1f03f1-62c8-40ba-beba-96e381180608.txt bp-6eea977a-2af7-433e-afc5-cebfd1180428.txt