1493578 - Suddenly, The position of the scroll arrow drastically shifts when mouse down and hold on scroll down arrow of scrollbar of library right side pane

Status: NEW

(Firefox :: Bookmarks & History, defect, P5)

Description

[Alice0775 White]

[Tracking Requested - why for this release]: UX regression!

This is annoying. And regression of UX. <- uiwanted!

The scroll down arrow button moves while mouse down on the The scroll down arrow button.
The down arrow button suddenly moves away from the position of the mouse pointer.


Preparation to reproduce:
1. Create a Bookmarks folder
2. Create many bookmarks in the folder

Steps To Reproduce:
1. Open Library (Ctrl+Shift+B)
2. Select the folder in the left pane(folder tree)
3. Mouse button down and hold on scroll down arrow of right side pane

Actual Results:
Suddenly, The position of the scroll arrow drastically shifts.

Expected Results:
Should not shift

Regression window:
https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=c094fc31b95f079c5cec2f3e88cb9fec0bdd7ca5&tochange=e9a9f3abd88935b5d4106a53d15d956ab2870ac4

Regression window:
e9a9f3abd889	Mark Banner — Bug 1463738 - Remove the Bookmark description UI. r=dao

Comment 1

[Alice0775 White]

screencast
https://youtu.be/kI0A96s9NKA

Comment 2

[Mark Banner (:standard8)]

This is basically another side-effect of bug 1471546.

Comment 3

[Marco Bonardo [:mak]]

we should fix the other bug first.

Comment 4

[Liz Henry (:lizzard) (privacy/fingerprinting team)]

Too late to fix in 63. We could still take a patch for 65 and potentially for 64.