1768378 - New smaller scrollbar aligns to the right even if on the left of the window

Status: RESOLVED DUPLICATE of bug 1764435

(Core :: Widget: Gtk, defect)

Description

[Sebastian LaVine]

Attachment: A video showing the bug.

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:100.0) Gecko/20100101 Firefox/100.0

Steps to reproduce:

1. Have "Always show scrollbars" option disabled, as is default in Firefox 100
2. Set layout.scrollbar.side to 3, to move the scrollbar to the left side of the screen
3. View (reload if already was open) a page long enough for the scrollbar to appear
4. Move the mouse around, so that the thinner scrollbar appears

Actual results:

The thinner scrollbar does appear on the left side of the screen, but not all the way on the side of the screen, as it would be if layout.scrollbar.side was set to the default value of 0. The width of the full-size scrollbar separates the thinner scrollbar from the side of the screen.

Expected results:

The thinner scrollbar should be more closely pressed against the side of the screen, as it is when the scrollbar is on the right side of the screen.