1374662 - Thumbnails disappear from "about:newtab" when adding a new thumbnail

Status: RESOLVED INVALID

(Firefox :: New Tab Page, defect)

Description

[Alexandru Simonca [:asimonca], Release Desktop QA]

Attachment: missing thumbnails3.webm

[Note]:
- This only happens with pages that start with "https://www.mozilla.org/en-US/"

[Affected versions]:
- 55.0b3 (id: 20170619071723)

[Affected platforms]:
- All

[Steps to reproduce]:
1. Open Firefox. Open "about:newtab"
2. Open bookmark toolbar.
3. Drag a bookmark from the toolbar to the thumbnail section.

[Expected result]:
- A new thumbnail is created and the others are left in place.

[Actual result]:
- A new thumbnail is created but an older one disappears.

[Regression range]:
- Will look for a regression as soon as possible.

[Additional notes]:
- Please see the attached video for further information.

Comment 1

[Tim Spurway [:tspurway]]

The old about:newtab (Tiles) has been replaced by Activity Stream, which does not have a 'drop' action any different than the rest of Firefox (ie. dropping any bookmark on a page will just navigate to it, even mozilla.org pages)