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I noticed that when I open up Gmail on Google Chrome, a popup near the top asks me if I want to let Gmail be my "mailto:" handler.

If I select "No," I'm assuming that Gmail will no longer ask me to be a mailto: handler. But then let's say I change my mind and do want Gmail to handle mailto: links, how do I get the popup to appear again?

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Did any of the answers work for you? If so, could you please accept that answer? I know one of them just solved this issue for me. –  oKtosiTe Feb 25 '13 at 9:37
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3 Answers

Look for an icon next to the star icon in the omni-box where the URL is displayed -- this icon is of the shape of overlapped double diamonds. click on it.

If you don't see it, try reload the page.

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This is the answer that worked for me. Thanks. –  cutchin Feb 11 '13 at 5:09
Wow. Mine has been set to 'ignore' for a long time. Thanks. –  bozdoz Jan 25 at 2:10
+1 That was obvious (not). –  Marcelo Cantos Apr 3 at 6:39
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  1. Click the Chrome Menu icon on the browser toolbar.
  2. Select Options (Preferences in Mac and Linux; Settings in Chrome OS) > Under the Hood.
  3. Click Content settings.
  4. In the dialog that appears, find the “Handlers” section:
  5. Select “Allow sites to ask to become default handlers for protocols."
  6. Click Manage handlers and Delete Gmail from Ignored protocol handlers
  7. Logout and Login to Gmail and click the small grey icon in the omnibox
  8. Select Allow Gmail to open email links
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Doesn't work here, there's no mailto under handlers and allthough i have it set to 'allow sites .... ' there is no question to handle emails even after closing and opening gmail / chrome .. –  user26958 Oct 20 '12 at 15:10
Same here. This answer is not adequate and the question remains unanswered. Any help out there please? –  NoCatharsis Oct 24 '12 at 17:48
This didn't help me and looks like it will only work if you have previously told it not to handle it. Mulogics answer below seems to work perfectly though. –  Chris Feb 27 '13 at 18:06
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A quick google turns up this: http://updates.html5rocks.com/2012/02/Getting-Gmail-to-handle-all-mailto-links-with-registerProtocolHandler I had to click a button in the URL field next to the star to select GMail as protocol handler.

It doesn't work on Windows 8 however, must be a change in the API. If I look into chrome://settings/handlers, I should see an entry then, but I am not able to select GMail in the dropdown.

Edit (Febr 2013): As stated in the comments it seems to work now.

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Works in windows 8 for me. Maybe they fixed whatever the problem was. –  Chris Feb 27 '13 at 18:07
Indeed, it works for me now, too. –  Sebastian Feb 27 '13 at 22:10
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