Bug 7992 - Clipping (and mouse panning) incorrectly enabled on non-touch Firefox
Summary: Clipping (and mouse panning) incorrectly enabled on non-touch Firefox
Status: NEW
Alias: None
Product: ThinLinc
Classification: Unclassified
Component: Web Access (show other bugs)
Version: trunk
Hardware: PC Unknown
: P2 Normal
Target Milestone: MediumPrio
Assignee: Bugzilla mail exporter
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2022-09-27 12:44 CEST by Pierre Ossman
Modified: 2024-01-23 11:17 CET (History)
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Description Pierre Ossman cendio 2022-09-27 12:44:15 CEST 
With recent versions of Firefox, Web Access will enable clipping and switch to mouse panning, even though the platform has scrollbars. Mouse panning is only supposed to be used on platforms with non-functional scrollbars (e.g. Android).

This is because Firefox has recently enabled "overlay" scrollbars. I.e., scrollbars that hide when not used. This breaks our detection of functional scrollbars, as it is based on the fact that they occupy space.

Upstream bug report:

https://github.com/novnc/noVNC/issues/1678

Firefox doesn't seem too sympathetic, so it seems we have to figure out a workaround.

Note that this currently affects Linux and Windows 11. A similar issue has been around for a while on macOS, but we had already managed that.
Comment 1 Pierre Ossman cendio 2024-01-23 11:17:13 CET 
Still an issue with Firefox 121.
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