On 10/19/2016 07:35 AM, Tim wrote:
> On Wed, 2016-10-19 at 11:29 +0100, Gary Stainburn wrote:
>> Be aware though that Firefox seems to try to be clever.  I use this
>> technique from home to access intranet web sites by first making an
>> inbound SSH connection. However, if I already have Firefox running
>> locally, then try to start a remote Firefox via the SSH connection, it
>> seems to want to action it via the local Firefox instance
> 
> That can be avoided by using "firefox -no-remote" as your command to
> start Firefox.  While the name of the option sounds counter-intuitive,
> think of it as your command to run a new instance of Firefox, as opposed
> to remotely controlling an already running instance (such as loading a
> new address in a tab).
> 
> When you run Firefox, you don't actually run it directly, you're calling
> its handler program.  That handler is making a decision about how to use
> Firefox.
> 
> See:  man firefox

I've done this before. Essentially:

        1. Ensure "X11Forwarding yes" is set in the REMOTE system's
        /etc/ssh/sshd_config file and make sure sshd has been restarted
        to read it.

        2. Run "xhost +" as root on the LOCAL system to permit everyone
        to make connections to the LOCAL system's X server.

        2. "su - unprivileged-user-name" on the LOCAL machine.

        3. "ssh -X user@REMOTEHOST" to log into the REMOTE machine.

        4. Verify you have a DISPLAY variable set by doing
        "echo $DISPLAY" on the REMOTE machine. You should get a value
        like "localhost:10.0", indicating you have X forwarded.

        5. Run "firefox" on the REMOTE machine. The display should pop
        up on your local machine.

This has worked for me for a long time.
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