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I just installed CFv6 on a live website. When I add the debugger, I see few extra lines of data being executed, which I'm not sure what they are and where they are coming from. They are called _ga, gid, two lines that looks like encrypted data, timezone, joomla_user_state, and Item ID. Non of these are in the original form, so I'm assuming they are being generated by CFv6 automatically. But I don't know what some of these mean (like the _ga, gid and the long code)
Here is an example:
I have a form, without any fields, only one submit button and a debugger. After I submit the form, here is what I get in the debugger:

Array
(
    [option] => com_chronoforms6
    [chronoform] => one-field
    [event] => submit
    [button1] => 
    [_ga] => GA1.2.898480496.1498502674
    [_gid] => GA1.2.737370596.1499310653
    [7e1irtgg72rtgg3f211214ed57b34ca0] => 106f5221686485290c426642b12e7d2a
    [timezone] => America/New_York
    [d3dac4bf98307d2aa9e96490f1d72ce5] => 8ab4f0702dd5afb2990d45e34edc1a1d
    [joomla_user_state] => logged_in
    [Itemid] => 
)