URL: https://outlookwebtest.sharepoint.com/sites/danceclub

Browser / Version: Firefox ESR 60.2.1esr
Operating System: Windows 10 Pro
Tested Another Browser: Yes

Problem type: Something else
Description: Missing tooltip when hovering over the cover photo of a post

Prerequisites:
1. Microsoft account (Enterprise) available and signed in.
2. Groups available.
3. Posts with cover photos available.

Steps to Reproduce:
1. Navigate to https://outlookwebtest.sharepoint.com/sites/danceclub
2. Hover over the cover photo.
3. Observe behavior.

Expected Behavior:
Tooltip is displayed.

Actual Behavior:
Tooltip is not displayed.

Note:
1. Reproducible on Firefox Nightly 64.0a1 (2018-09-28), Firefox Release 62.0.2.
2. Not reproducible on Chrome 69.0.3497.100.
3. Screenshot attached.

Affected area:

<div class="ms-Image imageArea_image_fabed714 root-61">
	<img class="ms-Image-image is-loaded ms-Image-image--cover ms-Image-image--landscape is-fadeIn image-154" aria-hidden="true" role="presentation" title="Test" src="https://outlookwebtest.sharepoint.com/_layouts/15/getpreview.ashx?guidSite=3c1d59c0-5810-4965-93a2-f6818487e752&amp;guidWeb=de055017-b947-45e7-b7aa-d799cd8c41b9&amp;guidFile=d766ded7-01fd-4b84-bf3e-c76de7112eea&amp;resolution=2">
</div>

Watchers:
@softvision-sergiulogigan
@softvision-oana-arbuzov

sv; type: enterprise-survey

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