1478406 - setting src property of iframes in responsive design mode causes overflowing divs to scroll to the top

Status: NEW

(DevTools :: Responsive Design Mode, defect, P3)

Description

[jmlee2k]

Attachment: index.html

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:61.0) Gecko/20100101 Firefox/61.0
Build ID: 20180704003137

Steps to reproduce:

- open the included index.html in responsive design mode
- scroll to the bottom of the div with numbers in it
- click the "load frame" button (the actual src of the frame doesn't matter, it just needs to load)


Actual results:

In FF 61, Once the frame loads, the div with numbers scrolls to the top.  On FF 62.0b11, the div scrolls to the top, then quickly scrolls back to the original position.



Expected results:

The scroll position of the div should remain unchanged.

Comment 2

[Patrick Brosset <:pbro>]

I reproduced this bug on Windows 10 with Firefox 63 (latest nightly). Everytime I load or clear the frame, the scrollable div goes back up to its top position.
This does not happen when the page isn't in RDM.