1499199 - Smooth scrolling continues on tab switch to-and-from PDF viewer

Status: RESOLVED DUPLICATE of bug 605751

(Core :: Panning and Zooming, defect)

Description

[amenaz1]

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.11; rv:62.0) Gecko/20100101 Firefox/62.0

Steps to reproduce:

On Mac 10.11.6:
1) Open a long, scroll-able PDF in one tab 
2) Open up a long, scroll-able webpage in a separate tab
3) Long scroll down in the PDF tab, and then immediately Command-Shift-] to switch tabs 
OR 
4) Long scroll down in the webpage and then immediately Command-Shift-] to switch to the PDF tab


Actual results:

For step 3) the webpage continues the smooth scroll from a previous tab and scrolls down
For step 4) the webpage continues the smooth scroll and also retains the Command key and causes the PDF to zoom out. 


Expected results:

Switching between tabs should terminate smooth scrolling.

Comment 1

[Daniel Bodea [:danibodea]]

I have reproduced your issue on MacBook with Mac OS X 10.13.6 as follows:
1. Download a PDF and open it in tab 1 of the browser.
2. Open a relatively long page in tab 2 of the browser.
3. Scroll tab 1 downwards and immediately press "control"+"tab" to switch tabs.
Actual: The tab is switched, but the scroll action is continued from the PDF tab, on the webpage tab.
Expected: The tab switch would be made, but the scroll should not be continued on the other tab.
4. Scroll tab 2 downwards and immediately press "control"+"tab" to switch tabs.
Actual: The tab is switched to PDF, but it is also zoomed out.
Expected: The tab should be switched, but the zooming action should not be made.

Note: This issue occurs on all browser versions: Nightly v64.0a1, Beta 63.0b14, Release 62.0.3.

Comment 2

[Kartikaya Gupta (email:[e-mail])]

This is a long-standing issue that unfortunately we haven't had the resources to fix yet.