On the Linux machines, sometimes Firefox gets locked so that a user can't open it. The error states something like: 'A Firefox process is already open but not responding....' This can happen if you didn't close firefox before shutting down one computer, and then you logged in to another computer. It also happens during single sessions on the same computer. Here's a way to fix it, from systems administrator Cody Nivens: Open a terminal, and enter the following commands: cd .mozilla cd firefox ls (to find the default directory, may be one or more) cd d (where d is the name of the default directory) rm lock |
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Firefox not opening |