I'm not too sure this is very useful. I think it is much better to track your visitor with Google Analytics or PiWik (which is what we usually do), but it should be rather easy to accomplish:

• create a custom field in CRM
• in the form create a hidden field for that custom field and fill it in with the _SERVER[“REMOTE_ADDR”] value

that's it.

That would have to be programmed if you want a specific button, but you can try this:

• create a custom field, maybe call it “create task”, let it be a checkbox (for simplicity)
• create a workflow that creates a task when the “create task” field is true and then sets the “create task” field to false
• now simply mass edit and set the field to true

Yes, this can be done. To activate this behavior two steps need to be taken. First, each user that wants this needs to go to their preferences screen and uncheck the “Internal Email Client” option. This option, which is checked by default, will open the application send email screen. When unselected the default browser behavior takes over. By default the browser will open the email client configured in the operating system but that can be changed in each browser. So our second step is to configure the browser to open GMail as can be read here:

• Click the menu button Menu and choose Preferences.
• Select the Applications panel.
• Search for the Content-type: mailto and select it.
• Click on the Actions column in the mailto row, to change the action to Webmail.
• Close the about:preferences page. Any changes you've made will automatically be saved.

I was able to make it work in Windows/Chrome, with the following conditions:

• Unticked the preference box Internal Mail Composer
• Logged out of vTiger & logged back in
• Installed a free Chrome extension called Mailto