1100814 - Cannot drag & drop bookmarks from the Library after a prior attempt was made with a special folder

Status: RESOLVED WORKSFORME

(Firefox :: Bookmarks & History, defect, P3)

Description

[Andrei Vaida [:avaida]]

Reproducible on: Nightly 36.0a1 (2014-11-16), *intermittently*.
Affected platform(s): Windows 7 64-bit, Mac OS X 10.9.5.

STR:
1. Launch Firefox using a clean profile.
2. Bookmark a few websites.
3. Open Library by clicking the bookmarks button → "Show All Bookmarks".
4. From "All Bookmarks", drag & drop the "Most Visited" special folder to the currently opened browser window.
5. Drag & drop any other bookmark from a different location available in the Library.

Expected result: 
* The user is unable to drag & drop a special bookmarks folder (such as "Most Visited") onto the browser's window.
* A non-special folder of bookmarks can be drag & dropped onto the browser's window.

Actual result: If a prior drag & drop was made using a special bookmarks folder, the next attempt made with a valid bookmark or bookmarks folder is failing as well.

Additional notes:
* This might be a recent regression, as I was unable to replicate it on Aurora 35.0a2 (2014-11-16). I'll follow up with a regression range on this matter as soon as possible.
* This issue is reproducible _only_ on Windows and Mac. Linux seems to be _unaffected_.

Comment 1

[Vasilica Tamas, QA [:vtamas]]

Regression range:

(m-c)
Last good revision: 2114ef80f6ae (2014-11-06)
First bad revision: b62ccf3228ba (2014-11-07)
Pushlog:
https://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=2114ef80f6ae&tochange=b62ccf3228ba

(m-i)
Last good revision: e228bf3b5f02
First bad revision: a75897e664dd
Pushlog:
https://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=e228bf3b5f02&tochange=a75897e664dd

According to *mozilla-inbound - pushlog*, I suspect that this issue is related with e10s enabled by default in Nightly.

Comment 2

[Simona Badau, Desktop QA]

I can no longer reproduce this issue, tried using the latest Nightly 96.0a1 on macOS Big Sur 11.6 and on Windows 7 x64 with a manually created "Most visited" folder (with the location - place:queryType=0&sort=8&maxResults=20). Based on this, marking it as Resolved Worksforme, if anyone else is still able to reproduce this, please feel free to reopen it. Thanks!