I noticed today a skull at the bottom-right in my Gmail Inbox.

This occurs at Google Chrome, Firefox and IE10.

Why is this so?

What does

Component Spy Mole Component Spy Data Spy Channel Spy Reload CSS LateLoad Spy AppContext Spy


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This appears to be an internal Gmail component, used for development of the web UI. I can't find any comments or explanations on why it shows up to outside users, but a Google employee has recognized this issue on Google Product Forums.

  • "I can confirm that this issue is purely superficial though, so no need to worry" is a little bit low, isn't it?
    – Smartis
    Dec 1 '15 at 9:43

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