1588821 - [regression] Firefox doesn't "Jump to the spot that's clicked" on macOS

Status: RESOLVED DUPLICATE of bug 1587962

(Core :: Security: Process Sandboxing, defect, P1)

Description

[Asif Youssuff]

STR:

1. Go to macOS preferences "General"
2. Enable option "Jump to the spot that's clicked" for "Click the scroll bar to"
3. Open Firefox
4. Navigate to a long page, like Apple's Wikipedia article
5. Click inside scrollbar to end of page.

What happens:

Page scrolls down a single page.

Expected result:

Page scrolls down to where clicked.

23:14.46 INFO: Narrowed inbound regression window from [bd4297fa, 22d335fc] (3 builds) to [e5103770, 22d335fc] (2 builds) (~1 steps left)
23:14.46 INFO: No more inbound revisions, bisection finished.
23:14.46 INFO: Last good revision: e51037702c9e8febad9b39f219fec3f22a6d7f26
23:14.46 INFO: First bad revision: 22d335fc020fb0509c67c4a945db21a27b8332d4
23:14.46 INFO: Pushlog:
https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=e51037702c9e8febad9b39f219fec3f22a6d7f26&tochange=22d335fc020fb0509c67c4a945db21a27b8332d4

Comment 1

[Asif Youssuff]

[Tracking Requested - why for this release]:

Visible macOS regression / platform consistency.

Comment 2

[Asif Youssuff]

Haik, please take a look into this macOS regression in scrolling caused by your patch in Bug 1501126.

Comment 3

[Pascal Chevrel:pascalc]

We have shipped multiple releases with this bug and the problem hasn't worsen, so we don't need to track it for 71. I would take a safe uplift in early betas for 71 if a patch happens for this issue.

Comment 4

[Haik Aftandilian [:haik]]

I can confirm this appears to be broken by sandboxing on Catalina. On Mojave, it works for me, but requires a browser restart for the change in the preferences to take effect in Firefox.

Comment 5

[Pascal Chevrel:pascalc]

Tracking for 71 now that we know that this will get worse with Catalina deployment. We may want to track it for 70 as well in case we uplift a fix to a dot release.

Comment 6

[Haik Aftandilian [:haik]]

@Asif, are you hitting this problem on Catalina? If not, could you include which macOS versions.

Comment 7

[Asif Youssuff]

Yes, I am hitting it in Catalina.

Also seeing this 10.14.6 (18G95) - I only had a few minutes on the Mojave machine (not my personal machine) so I was unable to confirm whether restarting Firefox allows the setting to work.

Comment 9

[Haik Aftandilian [:haik]]

This appears to be a duplicate of bug 1587962. Catalina has changed such that our content processes need explicit sandbox access to /Library/Preferences/.GlobalPreferences.plist in order to read the the scrolling setting. See bug 1587962 comment 9 for more information.