Closed Bug 1370188 Opened 4 years ago Closed 4 years ago

"Use Smooth Scrolling" stopped working on macOS


(Core :: Widget: Cocoa, defect)

53 Branch
Not set





(Reporter: kathampy, Unassigned)


(Keywords: regression, regressionwindow-wanted)

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.12; rv:53.0) Gecko/20100101 Firefox/53.0
Build ID: 20170518000419

Steps to reproduce:

Enable "Use Smooth Scrolling" in preferences. Use an external mouse with a scroll wheel on macOS.

Actual results:

Smooth scrolling does not work at all. There is no difference with the option enabled or disabled. This stopped working on macOS a few versions ago but it used to work fine. It still works fine on Windows.

Expected results:

The scroll wheel should scroll the page smoothly. The behaviour of this setting should be the same on macOS and Windows i.e. it makes the scroll wheel scroll pages smoothly.
Summary: Smooth Scrolling stopped working on macOS → "Use Smooth Scrolling" stopped working on macOS
OS: Unspecified → Mac OS X
Hardware: Unspecified → x86_64
Component: Untriaged → Widget: Cocoa
Product: Firefox → Core
Kats, curious if you can tell us if this is expected?
Flags: needinfo?(bugmail)
I don't think this is expected, no. Getting a regression window would be good.
Flags: needinfo?(bugmail)
Kurian, can you please post your about:support text?
Flags: needinfo?(kathampy)
Application Basics

Name: Firefox
Version: 54.0
Build ID: 20170608105825
Update Channel: release
User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.12; rv:54.0) Gecko/20100101 Firefox/54.0
OS: Darwin 16.6.0
Multiprocess Windows: 1/1 (Enabled by user)
Google Key: Found
Mozilla Location Service Key: Found
Safe Mode: false

Crash Reports for the Last 3 Days

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Name: 1Password
Version: 4.6.6
Enabled: true

Name: Adblock Plus
Version: 2.9.1
Enabled: true
ID: {d10d0bf8-f5b5-c8b4-a8b2-2b9879e08c5d}

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Version: 2.2.3
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Version: 2.0
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Version: 6.6.0
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Name: YesScript
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Enabled: true


Compositing: OpenGL
Asynchronous Pan/Zoom: wheel input enabled
WebGL 1 Driver WSI Info: CGL
WebGL 1 Driver Renderer: NVIDIA Corporation -- NVIDIA GeForce GT 750M OpenGL Engine
WebGL 1 Driver Version: 2.1 NVIDIA-10.18.5 378.05.05.15f01
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WebGL 1 Extensions: ANGLE_instanced_arrays EXT_blend_minmax EXT_color_buffer_half_float EXT_frag_depth EXT_sRGB EXT_shader_texture_lod EXT_texture_filter_anisotropic MOZ_debug_get OES_element_index_uint OES_standard_derivatives OES_texture_float OES_texture_float_linear OES_texture_half_float OES_texture_half_float_linear OES_vertex_array_object WEBGL_color_buffer_float WEBGL_compressed_texture_s3tc WEBGL_debug_renderer_info WEBGL_debug_shaders WEBGL_depth_texture WEBGL_draw_buffers WEBGL_lose_context MOZ_WEBGL_lose_context MOZ_WEBGL_compressed_texture_s3tc MOZ_WEBGL_depth_texture
WebGL 2 Driver WSI Info: CGL
WebGL2 Renderer: NVIDIA Corporation -- NVIDIA GeForce GT 750M OpenGL Engine
WebGL 2 Driver Version: 4.1 NVIDIA-10.18.5 378.05.05.15f01
WebGL 2 Driver Extensions: GL_ARB_blend_func_extended GL_ARB_draw_buffers_blend GL_ARB_draw_indirect GL_ARB_ES2_compatibility GL_ARB_explicit_attrib_location GL_ARB_gpu_shader_fp64 GL_ARB_gpu_shader5 GL_ARB_instanced_arrays GL_ARB_internalformat_query GL_ARB_occlusion_query2 GL_ARB_sample_shading GL_ARB_sampler_objects GL_ARB_separate_shader_objects GL_ARB_shader_bit_encoding GL_ARB_shader_subroutine GL_ARB_shading_language_include GL_ARB_tessellation_shader GL_ARB_texture_buffer_object_rgb32 GL_ARB_texture_cube_map_array GL_ARB_texture_gather GL_ARB_texture_query_lod GL_ARB_texture_rgb10_a2ui GL_ARB_texture_storage GL_ARB_texture_swizzle GL_ARB_timer_query GL_ARB_transform_feedback2 GL_ARB_transform_feedback3 GL_ARB_vertex_attrib_64bit GL_ARB_vertex_type_2_10_10_10_rev GL_ARB_viewport_array GL_EXT_debug_label GL_EXT_debug_marker GL_EXT_depth_bounds_test GL_EXT_framebuffer_multisample_blit_scaled GL_EXT_texture_compression_s3tc GL_EXT_texture_filter_anisotropic GL_EXT_texture_mirror_clamp GL_EXT_texture_sRGB_decode GL_APPLE_client_storage GL_APPLE_container_object_shareable GL_APPLE_flush_render GL_APPLE_object_purgeable GL_APPLE_rgb_422 GL_APPLE_row_bytes GL_APPLE_texture_range GL_ATI_texture_mirror_once GL_NV_texture_barrier
WebGL 2 Extensions: EXT_color_buffer_float EXT_texture_filter_anisotropic EXT_disjoint_timer_query MOZ_debug_get OES_texture_float_linear WEBGL_compressed_texture_s3tc WEBGL_debug_renderer_info WEBGL_debug_shaders WEBGL_lose_context MOZ_WEBGL_lose_context MOZ_WEBGL_compressed_texture_s3tc
Audio Backend: audiounit
GPU #1
Active: Yes
Vendor ID: 0x10de
Device ID: 0x0fe9

AzureCanvasAccelerated: 1
AzureCanvasBackend: skia
AzureContentBackend: skia
AzureFallbackCanvasBackend: none
TileHeight: 1024
TileWidth: 1024
Decision Log
unavailable by runtime: Build doesn't include WebRender

Important Modified Preferences

accessibility.typeaheadfind.flashBar: 0
browser.cache.disk.capacity: 358400
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browser.cache.disk.smart_size.first_run: false
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browser.cache.frecency_experiment: 3 true
browser.fixup.alternate.enabled: false 0
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gfx.color_management.enablev4: true
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privacy.cpd.siteSettings: true
privacy.donottrackheader.enabled: true
privacy.sanitize.timeSpan: 0
security.disable_button.openCertManager: false
security.sandbox.content.tempDirSuffix: {48e7a605-b316-d54e-a8a9-db8cdf8c2ab8}
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services.sync.lastPing: 1497444918
services.sync.lastSync: Thu Jun 15 2017 13:59:39 GMT+0530 (IST)
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storage.vacuum.last.places.sqlite: 1497514758

Important Locked Preferences

Places Database


Incremental GC: true


Activated: false
Prevent Accessibility: 0

Library Versions

Expected minimum version: 4.14
Version in use: 4.14

Expected minimum version: 3.30.2
Version in use: 3.30.2

Expected minimum version: 3.30.2
Version in use: 3.30.2

Expected minimum version: 3.30.2
Version in use: 3.30.2

Expected minimum version: 3.30.2
Version in use: 3.30.2

Experimental Features


Content Process Sandbox Level: 1
Flags: needinfo?(kathampy)
Kurian, could you get a regression range using mozregression?
sudo easy_install pip
sudo pip2 install -U mozregression
mozregression --good 2016-07-12
Flags: needinfo?(kathampy)
Unfortunately I can't run mozregression though the firewall here.
Flags: needinfo?(kathampy) → needinfo?(mstange)
Unfortunately I can't reproduce this on my machine. I'm trying with a regular external mouse with a scroll wheel, on 10.12.
Do you have any custom mouse drivers installed, or some other mouse utility like SteerMouse?
Flags: needinfo?(mstange) → needinfo?(kathampy)
I just tested on Firefox 54 and smooth scrolling has started working again.

I have a Logitech G500S. The LGS software is installed, but not running.
I have SmoothScroll ( installed, but disabled for Firefox since Firefox has its own smooth scrolling. I had temporarily enabled it for Firefox while smooth scrolling was not working.
I have Scroll Reverser installed and enabled.
Flags: needinfo?(kathampy)
I reinstalled Firefox 53 to test noticed something very strange. Scrolling does not respond when the mouse wheel is rotated by a single notch. I need to turn it by at least three notches to make the page move. This applies when "Use Smooth Scrolling" is both enabled and disabled. And smooth scrolling *is* working in Firefox 53 now.

This scroll wheel minimum movement bug was a macOS Sierra bug, but was fixed by Apple long ago. It's not resurfaced only in Firefox 53. When I use Firefox 54 it is *not* present i.e. scrolling a single notch is recognized.
Oh, good, so this was just bug 1355340 all along.
Closed: 4 years ago
Resolution: --- → DUPLICATE
Duplicate of bug: 1355340
(In reply to Markus Stange [:mstange] from comment #10)
> Oh, good, so this was just bug 1355340 all along.

It was not behaving like that bug at all. When I originally reported, only the smooth scrolling did not work. It did register every single tick perfectly - it just wasn't scrolling smoothly.

When I went back to 53 today, only the first 2 ticks exactly were being ignored, and if you scrolled below a certain speed it would not scroll *at all*. This was exactly like the Sierra bug Apple introduced and fixed.
Okay, then I don't really understand what's going on. It sounds like you got different behavior with 53 two weeks ago than you get with 53 today. I find it unlikely that Apple changed something here, but I suppose it's not completely impossible.

However, since everything's working now, I don't think we need to get to the bottom of this.
The difference is I ran 53 today with a new profile, so that's a big unknown. However the result of this was it behaved identically to the Sierra bug. Apple introduced that bug in 10.12.0 and fixed it in 10.12.1 months ago. I brought it up because the behaviour in 53 today is identical to that bug.
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