I have set up Chrome to always open the Gmail Offline app on startup so that I always have a synched version of my email when I'm offline.

However, I'd like the tab for the Gmail Offline to have the blue Gmail icon (see below) representing offline so as not to confuse it with the red icon in the next tab for my normal Gmail session.

I cannot seem to find an option to edit the tab label and icon in Chrome. Is there an easy way to do this?

Offline Gmail icon

2 Answers 2


You can use the Tab Modifier extension and set the icon property in the json as described here to use the blue Gmail icon.

  • 1
    This extension also works in Microsoft Edge in Windows 10/11, which is not true in the general case for other Chrome extensions.
    – TecMan
    Commented Oct 21, 2021 at 6:55

First, you need to get an image which I choose https://visualpharm.com/assets/783/Facebook%20Like-595b40b65ba036ed117d1f0f.svg

You switch the link this Is a code sample of how an icon is made <link rel="Shortcut Icon" href="http://www.newrafael.com/favicon.ico"> you change it to this <link rel="Shortcut Icon" href="https://visualpharm.com/assets/783/Facebook%20Like-595b40b65ba036ed117d1f0f.svg">

Then that's how you change an icon . . . .Note: When you reload the page the icon will change to org

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