1702736 - Page context menu opens with a ~300ms delay while double-tap to zoom is disabled at Fx level but enabled at OS level

Status: RESOLVED WONTFIX

(Core :: Panning and Zooming, defect)

Description

[Emil Ghitta, QA [:emilghitta]]

Affected versions

• Firefox 88.0b6 (BuildId:20210401185811)
• Firefox 89.0a1 (BuildId:20210330215136)

Affected platforms

• macOS 10.14
• macOS 10.15
• macOS 11

Unaffected platforms

• Windows 10 64bit
• Ubuntu 20.04

Preconditions

• Have the following pref disabled: apz.mac.enable_double_tap_zoom_touchpad_gesture

Steps to reproduce

1. Launch Firefox.
2. Access a random webpage.
3. Single-tap with 2 fingers on the trackpad in order to trigger the context menu.

Expected result

• The context menu opens instantly (without any delay) since the double-tap to zoom functionality is disabled at Firefox level and there is no point to wait ~300ms for the user to perform a second double-tap.

Actual result

• It seems that the context menu opens with a short delay (~300ms) even though the double-tap to zoom functionality was disabled at Firefox level.

Regression Range

• I don’t think that this is a regression.

Notes

• The ~300ms delay seems to occur even though the double-tap to zoom is disabled at Firefox level. The ~300ms delay is no longer encountered while disabling the double-tap to zoom at OS level.

Comment 1

[Timothy Nikkel (:tnikkel)]

Note that you need to have tap to click enabled in the system settings to see this (not sure if that is the default or not). I see the same behaviour in Chrome and Safari and in Firefox before I implemented the double tap feature. The OS must be delaying sending the events to us when it detects it could be the start of a double tap gesture, and I'm not sure the OS could implement this in any other way.

I'm resolving this wontfix, but its more like cantfix.