Affected versions

• latest Nightly 72.0a1
• Beta 71.0b7

Affected platforms

• Windows 7 x64

Prerequisites
The following prefs are set in about:config:
browser.newtabpage.activity-stream.asrouter.devtoolsEnabled pref to "true"
browser.contentblocking.cfr-milestone.milestone-achieved to "1000"
browser.newtabpage.activity-stream.asrouter.providers.cfr to {"id":"cfr","enabled":true,"type":"local","localProvider":"CFRMessageProvider","frequency":{"custom":[{"period":"daily","cap":10}]},"categories":["cfrAddons","cfrFeatures"],"updateCycleInMs":3600000}
Restart the browser.

Steps to reproduce

1. Access "about:newtab#devtools" page.
2. From the "Messages" section, click on the drop-down menu and select "cfr".
3. Scroll down and click on the “Show” button from the “MILESTONE_MESSAGE” section in order to force the popup to appear.
4. Click on the shield icon.
5. Hover with the mouse over the Celebration Toast notification.

Expected result

• The Celebration Toast notification is properly displayed.

Actual result

• The Celebration Toast has a lighter border in the upper part of the notification.

Regression range

• Not a regression.

Additional notes

• I'm not completely sure that this is indeed an issue, might as well be a shadow effect specific to Win 7.
• Please observe the attached screenshot.

Eric, what do you think of the message looking like a giant button? I'm thinking it's an issue.

Thanks for flagging me. The background should all should be one color without an outer stroke.

I looked at this on a VM for Windows 7 and Windows 10, both of them looked like this.
I wonder if this was fixed with Bug 1593984?

(In reply to Erica Wright [:ewright] from comment #3)

Created attachment 9107614 [details]
Screen Shot 2019-11-08 at 4.35.49 PM.png

I looked at this on a VM for Windows 7 and Windows 10, both of them looked like this.
I wonder if this was fixed with Bug 1593984?

Confirming that the issue is not reproducible in latest Nightly 72.0a1 (20191111215252) running Windows 7 x64. Thanks!