1419028 - some users seeing bad perf from a11y even though they are not using a11y tools

Status: RESOLVED DUPLICATE of bug 1418290

(Core :: Disability Access APIs, defect)

Description

[Ben Kelly [:bkelly, not reviewing]]

Over the last week I've helped a few users on twitter who were experiencing bad performance in firefox quantum on windows.  Enabling the "prevent accessibility services" setting in about:preferences fixed the problem for them.  Strangely, none of the users I've helped were purposely using accessibility features.

For example, see this twitter thread:

https://twitter.com/bytezilla/status/932094594132660224

This user sent me their about:support in a pastebin. See below.

David, do you have any idea what is going on here?

Application Basics
------------------

Name: Firefox
Version: 57.0
Build ID: 20171112125346
Update Channel: release-cck-mozilla113
User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:57.0) Gecko/20100101 Firefox/57.0
OS: Windows_NT 10.0
Multiprocess Windows: 1/1 (Enabled by default)
Web Content Processes: 4/4
Stylo: true (enabled by default)
Google Key: Found
Mozilla Location Service Key: Found
Safe Mode: false

Crash Reports for the Last 3 Days
---------------------------------

All Crash Reports (including 3 pending crashes in the given time range)

Firefox Features
----------------

Name: Activity Stream
Version: 2017.11.07.1100-7f4e3634
ID: [e-mail]

Name: Application Update Service Helper
Version: 2.0
ID: [e-mail]

Name: Firefox Screenshots
Version: 19.2.0
ID: [e-mail]

Name: Follow-on Search Telemetry
Version: 0.9.6
ID: [e-mail]

Name: Form Autofill
Version: 1.0
ID: [e-mail]

Name: Multi-process staged rollout
Version: 3.05
ID: [e-mail]

Name: Photon onboarding
Version: 1.0
ID: [e-mail]

Name: Pocket
Version: 1.0.5
ID: [e-mail]

Name: Shield Recipe Client
Version: 76.1
ID: [e-mail]

Name: Web Compat
Version: 1.1
ID: [e-mail]

Extensions
----------

Name: AdBlock
Version: 3.8.0
Enabled: true
ID: jid1-NIfFY2CA8fy1tg@jetpack

Name: Avast Online Security
Version: 12.0.296
Enabled: true
ID: [e-mail]

Name: Sticky Password extension
Version: 8.0.12.130
Enabled: true
ID: {ecb80162-dfbd-4d91-a8da-17b35ba4707a}

Name: Avast SafePrice
Version: 12.0.330
Enabled: false
ID: [e-mail]

Name: DNS Flusher
Version: 4.0.0
Enabled: false
ID: {7d575baa-b543-11dc-8314-0800200c9a66}

Name: Firefox OnBoard
Version: 1.0.6
Enabled: false
ID: @onboard-v2

Graphics
--------

Features
Compositing: Direct3D 11 (Advanced Layers)
Asynchronous Pan/Zoom: wheel input enabled; scrollbar drag enabled; keyboard enabled; autoscroll enabled
WebGL 1 Driver WSI Info: EGL_VENDOR: Google Inc. (adapter LUID: 000000000000e01e) EGL_VERSION: 1.4 (ANGLE 2.1.0.dec065540d5f) EGL_EXTENSIONS: EGL_EXT_create_context_robustness EGL_ANGLE_d3d_share_handle_client_buffer EGL_ANGLE_d3d_texture_client_buffer EGL_ANGLE_surface_d3d_texture_2d_share_handle EGL_ANGLE_query_surface_pointer EGL_ANGLE_window_fixed_size EGL_ANGLE_keyed_mutex EGL_ANGLE_surface_orientation EGL_ANGLE_direct_composition EGL_NV_post_sub_buffer EGL_KHR_create_context EGL_EXT_device_query EGL_KHR_image EGL_KHR_image_base EGL_KHR_gl_texture_2D_image EGL_KHR_gl_texture_cubemap_image EGL_KHR_gl_renderbuffer_image EGL_KHR_get_all_proc_addresses EGL_KHR_stream EGL_KHR_stream_consumer_gltexture EGL_NV_stream_consumer_gltexture_yuv EGL_ANGLE_flexible_surface_compatibility EGL_ANGLE_stream_producer_d3d_texture_nv12 EGL_ANGLE_create_context_webgl_compatibility EGL_CHROMIUM_create_context_bind_generates_resource EGL_EXTENSIONS(nullptr): EGL_EXT_client_extensions EGL_EXT_platform_base EGL_EXT_platform_device EGL_ANGLE_platform_angle EGL_ANGLE_platform_angle_d3d EGL_ANGLE_device_creation EGL_ANGLE_device_creation_d3d11 EGL_ANGLE_experimental_present_path EGL_KHR_client_get_all_proc_addresses
WebGL 1 Driver Renderer: Google Inc. -- ANGLE (NVIDIA GeForce GTX 745 Direct3D11 vs_5_0 ps_5_0)
WebGL 1 Driver Version: OpenGL ES 2.0 (ANGLE 2.1.0.dec065540d5f)
WebGL 1 Driver Extensions: GL_ANGLE_depth_texture GL_ANGLE_framebuffer_blit GL_ANGLE_framebuffer_multisample GL_ANGLE_instanced_arrays GL_ANGLE_lossy_etc_decode GL_ANGLE_pack_reverse_row_order GL_ANGLE_request_extension GL_ANGLE_robust_client_memory GL_ANGLE_texture_compression_dxt3 GL_ANGLE_texture_compression_dxt5 GL_ANGLE_texture_usage GL_ANGLE_translated_shader_source GL_CHROMIUM_bind_generates_resource GL_CHROMIUM_bind_uniform_location GL_CHROMIUM_copy_compressed_texture GL_CHROMIUM_copy_texture GL_CHROMIUM_sync_query GL_EXT_blend_minmax GL_EXT_color_buffer_half_float GL_EXT_debug_marker GL_EXT_discard_framebuffer GL_EXT_disjoint_timer_query GL_EXT_draw_buffers GL_EXT_frag_depth GL_EXT_map_buffer_range GL_EXT_occlusion_query_boolean GL_EXT_read_format_bgra GL_EXT_robustness GL_EXT_sRGB GL_EXT_shader_texture_lod GL_EXT_texture_compression_dxt1 GL_EXT_texture_filter_anisotropic GL_EXT_texture_format_BGRA8888 GL_EXT_texture_rg GL_EXT_texture_storage GL_EXT_unpack_subimage GL_KHR_debug GL_NV_EGL_stream_consumer_external GL_NV_fence GL_NV_pack_subimage GL_NV_pixel_buffer_object GL_OES_EGL_image GL_OES_EGL_image_external GL_OES_compressed_ETC1_RGB8_texture GL_OES_depth32 GL_OES_element_index_uint GL_OES_get_program_binary GL_OES_mapbuffer GL_OES_packed_depth_stencil GL_OES_rgb8_rgba8 GL_OES_standard_derivatives GL_OES_texture_float GL_OES_texture_float_linear GL_OES_texture_half_float GL_OES_texture_half_float_linear GL_OES_texture_npot GL_OES_vertex_array_object
WebGL 1 Extensions: ANGLE_instanced_arrays EXT_blend_minmax EXT_color_buffer_half_float EXT_frag_depth EXT_shader_texture_lod EXT_texture_filter_anisotropic EXT_disjoint_timer_query 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: EGL_VENDOR: Google Inc. (adapter LUID: 000000000000e01e) EGL_VERSION: 1.4 (ANGLE 2.1.0.dec065540d5f) EGL_EXTENSIONS: EGL_EXT_create_context_robustness EGL_ANGLE_d3d_share_handle_client_buffer EGL_ANGLE_d3d_texture_client_buffer EGL_ANGLE_surface_d3d_texture_2d_share_handle EGL_ANGLE_query_surface_pointer EGL_ANGLE_window_fixed_size EGL_ANGLE_keyed_mutex EGL_ANGLE_surface_orientation EGL_ANGLE_direct_composition EGL_NV_post_sub_buffer EGL_KHR_create_context EGL_EXT_device_query EGL_KHR_image EGL_KHR_image_base EGL_KHR_gl_texture_2D_image EGL_KHR_gl_texture_cubemap_image EGL_KHR_gl_renderbuffer_image EGL_KHR_get_all_proc_addresses EGL_KHR_stream EGL_KHR_stream_consumer_gltexture EGL_NV_stream_consumer_gltexture_yuv EGL_ANGLE_flexible_surface_compatibility EGL_ANGLE_stream_producer_d3d_texture_nv12 EGL_ANGLE_create_context_webgl_compatibility EGL_CHROMIUM_create_context_bind_generates_resource EGL_EXTENSIONS(nullptr): EGL_EXT_client_extensions EGL_EXT_platform_base EGL_EXT_platform_device EGL_ANGLE_platform_angle EGL_ANGLE_platform_angle_d3d EGL_ANGLE_device_creation EGL_ANGLE_device_creation_d3d11 EGL_ANGLE_experimental_present_path EGL_KHR_client_get_all_proc_addresses
WebGL 2 Driver Renderer: Google Inc. -- ANGLE (NVIDIA GeForce GTX 745 Direct3D11 vs_5_0 ps_5_0)
WebGL 2 Driver Version: OpenGL ES 3.0 (ANGLE 2.1.0.dec065540d5f)
WebGL 2 Driver Extensions: GL_ANGLE_depth_texture GL_ANGLE_framebuffer_blit GL_ANGLE_framebuffer_multisample GL_ANGLE_instanced_arrays GL_ANGLE_lossy_etc_decode GL_ANGLE_pack_reverse_row_order GL_ANGLE_request_extension GL_ANGLE_robust_client_memory GL_ANGLE_texture_compression_dxt3 GL_ANGLE_texture_compression_dxt5 GL_ANGLE_texture_usage GL_ANGLE_translated_shader_source GL_CHROMIUM_bind_generates_resource GL_CHROMIUM_bind_uniform_location GL_CHROMIUM_copy_compressed_texture GL_CHROMIUM_copy_texture GL_CHROMIUM_sync_query GL_EXT_blend_minmax GL_EXT_color_buffer_float GL_EXT_color_buffer_half_float GL_EXT_debug_marker GL_EXT_discard_framebuffer GL_EXT_disjoint_timer_query GL_EXT_draw_buffers GL_EXT_frag_depth GL_EXT_map_buffer_range GL_EXT_occlusion_query_boolean GL_EXT_read_format_bgra GL_EXT_robustness GL_EXT_sRGB GL_EXT_shader_texture_lod GL_EXT_texture_compression_dxt1 GL_EXT_texture_filter_anisotropic GL_EXT_texture_format_BGRA8888 GL_EXT_texture_norm16 GL_EXT_texture_rg GL_EXT_texture_storage GL_EXT_unpack_subimage GL_KHR_debug GL_NV_EGL_stream_consumer_external GL_NV_fence GL_NV_pack_subimage GL_NV_pixel_buffer_object GL_OES_EGL_image GL_OES_EGL_image_external GL_OES_EGL_image_external_essl3 GL_OES_compressed_ETC1_RGB8_texture GL_OES_depth32 GL_OES_element_index_uint GL_OES_get_program_binary GL_OES_mapbuffer GL_OES_packed_depth_stencil GL_OES_rgb8_rgba8 GL_OES_standard_derivatives GL_OES_texture_float GL_OES_texture_float_linear GL_OES_texture_half_float GL_OES_texture_half_float_linear GL_OES_texture_npot GL_OES_vertex_array_object
WebGL 2 Extensions: EXT_color_buffer_float EXT_texture_filter_anisotropic EXT_disjoint_timer_query 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
Direct2D: true
DirectWrite: true (10.0.16299.15)
GPU #1
Active: Yes
Description: NVIDIA GeForce GTX 745
Vendor ID: 0x10de
Device ID: 0x1382
Driver Version: 23.21.13.8813
Driver Date: 10-27-2017
Drivers: C:\WINDOWS\System32\DriverStore\FileRepository\nv_desktop_ref4wu.inf_amd64_0109a19b5125cb43\nvldumdx.dll,C:\WINDOWS\System32\DriverStore\FileRepository\nv_desktop_ref4wu.inf_amd64_0109a19b5125cb43\nvldumdx.dll,C:\WINDOWS\System32\DriverStore\FileRepository\nv_desktop_ref4wu.inf_amd64_0109a19b5125cb43\nvldumdx.dll,C:\WINDOWS\System32\DriverStore\FileRepository\nv_desktop_ref4wu.inf_amd64_0109a19b5125cb43\nvldumdx.dll C:\WINDOWS\System32\DriverStore\FileRepository\nv_desktop_ref4wu.inf_amd64_0109a19b5125cb43\nvldumd.dll,C:\WINDOWS\System32\DriverStore\FileRepository\nv_desktop_ref4wu.inf_amd64_0109a19b5125cb43\nvldumd.dll,C:\WINDOWS\System32\DriverStore\FileRepository\nv_desktop_ref4wu.inf_amd64_0109a19b5125cb43\nvldumd.dll,C:\WINDOWS\System32\DriverStore\FileRepository\nv_desktop_ref4wu.inf_amd64_0109a19b5125cb43\nvldumd.dll
Subsys ID: 106510de
RAM: 4096

Diagnostics
AzureCanvasAccelerated: 0
AzureCanvasBackend: Direct2D 1.1
AzureCanvasBackend (UI Process): skia
AzureContentBackend: Direct2D 1.1
AzureContentBackend (UI Process): skia
AzureFallbackCanvasBackend (UI Process): cairo
GPUProcessPid: 16712
Decision Log
WEBRENDER:
opt-in by default: WebRender is an opt-in feature
unavailable by runtime: Build doesn't include WebRender




Media
-----

Audio Backend: wasapi
Max Channels: 2
Preferred Channel Layout: stereo
Preferred Sample Rate: 48000
Output Devices
Name: Group
Speakers / Headphones (Realtek High Definition Audio): HDAUDIO\FUNC_01&VEN_10EC&DEV_0899&SUBSYS_102806B8&REV_1000\4&3aa43e2c&0&0001
NVIDIA Output (NVIDIA High Definition Audio): HDAUDIO\FUNC_01&VEN_10DE&DEV_0060&SUBSYS_10DE1065&REV_1001\5&2b9bf7f3&0&0001
VE228-4 (NVIDIA High Definition Audio): HDAUDIO\FUNC_01&VEN_10DE&DEV_0060&SUBSYS_10DE1065&REV_1001\5&2b9bf7f3&0&0001
Input Devices
Name: Group
Stereo Mix (Realtek High Definition Audio): HDAUDIO\FUNC_01&VEN_10EC&DEV_0899&SUBSYS_102806B8&REV_1000\4&3aa43e2c&0&0001
Speakers / Headphones (Realtek High Definition Audio): HDAUDIO\FUNC_01&VEN_10EC&DEV_0899&SUBSYS_102806B8&REV_1000\4&3aa43e2c&0&0001
Speakers / Headphones (Realtek High Definition Audio): HDAUDIO\FUNC_01&VEN_10EC&DEV_0899&SUBSYS_102806B8&REV_1000\4&3aa43e2c&0&0001
Speakers / Headphones (Realtek High Definition Audio): HDAUDIO\FUNC_01&VEN_10EC&DEV_0899&SUBSYS_102806B8&REV_1000\4&3aa43e2c&0&0001
Internal AUX Jack (NVIDIA High Definition Audio): HDAUDIO\FUNC_01&VEN_10DE&DEV_0060&SUBSYS_10DE1065&REV_1001\5&2b9bf7f3&0&0001
Speakers / Headphones (Realtek High Definition Audio): HDAUDIO\FUNC_01&VEN_10EC&DEV_0899&SUBSYS_102806B8&REV_1000\4&3aa43e2c&0&0001
Speakers / Headphones (Realtek High Definition Audio): HDAUDIO\FUNC_01&VEN_10EC&DEV_0899&SUBSYS_102806B8&REV_1000\4&3aa43e2c&0&0001
Microphone (Realtek High Definition Audio): HDAUDIO\FUNC_01&VEN_10EC&DEV_0899&SUBSYS_102806B8&REV_1000\4&3aa43e2c&0&0001
Line In (Realtek High Definition Audio): HDAUDIO\FUNC_01&VEN_10EC&DEV_0899&SUBSYS_102806B8&REV_1000\4&3aa43e2c&0&0001
Speakers / Headphones (Realtek High Definition Audio): HDAUDIO\FUNC_01&VEN_10EC&DEV_0899&SUBSYS_102806B8&REV_1000\4&3aa43e2c&0&0001
Speakers / Headphones (Realtek High Definition Audio): HDAUDIO\FUNC_01&VEN_10EC&DEV_0899&SUBSYS_102806B8&REV_1000\4&3aa43e2c&0&0001

Important Modified Preferences
------------------------------

accessibility.force_disabled: 1
accessibility.lastLoadDate: 1510690735
accessibility.loadedInLastSession: true
accessibility.typeaheadfind.flashBar: 0
browser.cache.disk.capacity: 358400
browser.cache.disk.filesystem_reported: 1
browser.cache.disk.hashstats_reported: 1
browser.cache.disk.smart_size.first_run: false
browser.cache.disk.smart_size.use_old_max: false
browser.cache.frecency_experiment: 4
browser.places.smartBookmarksVersion: 8
browser.sessionstore.upgradeBackup.latestBuildID: 20171112125346
browser.startup.homepage: https://news.google.com/|https://mail.google.com/mail/u/0/#inbox
browser.startup.homepage_override.buildID: 20171112125346
browser.startup.homepage_override.mstone: 57.0
browser.tabs.remote.autostart.2: true
browser.tabs.warnOnClose: false
browser.urlbar.daysBeforeHidingSuggestionsPrompt: 0
browser.urlbar.lastSuggestionsPromptDate: 20170826
browser.urlbar.timesBeforeHidingSuggestionsHint: 0
dom.ipc.processCount.web: 4
dom.push.userAgentID: 0170c560521b48ddb238cd268fe87b64
extensions.lastAppVersion: 57.0
font.internaluseonly.changed: true
gfx.crash-guard.d3d11layers.appVersion: 56.0.2
gfx.crash-guard.d3d11layers.deviceID: 0x1382
gfx.crash-guard.d3d11layers.driverVersion: 22.21.13.8205
gfx.crash-guard.d3d11layers.feature-d2d: true
gfx.crash-guard.d3d11layers.feature-d3d11: true
gfx.crash-guard.status.d3d11layers: 2
gfx.crash-guard.status.d3d11video: 2
gfx.crash-guard.status.d3d9video: 2
layers.mlgpu.sanity-test-failed: false
media.benchmark.vp9.fps: 219
media.benchmark.vp9.versioncheck: 2
media.gmp-gmpopenh264.abi: x86_64-msvc-x64
media.gmp-gmpopenh264.lastUpdate: 1510282412
media.gmp-gmpopenh264.version: 1.7.1
media.gmp-manager.buildID: 20171112125346
media.gmp-manager.lastCheck: 1511072669
media.gmp-widevinecdm.abi: x86_64-msvc-x64
media.gmp-widevinecdm.lastUpdate: 1508466651
media.gmp-widevinecdm.version: 1.4.8.1008
media.gmp.storage.version.observed: 1
media.hardware-video-decoding.failed: false
media.webrtc.debug.log_file: C:\Users\Jeff\AppData\Local\Temp\WebRTC.log
network.cookie.prefsMigrated: true
network.predictor.cleaned-up: true
places.database.lastMaintenance: 1510970164
places.history.enabled: false
places.history.expiration.transient_current_max_pages: 104858
plugin.disable_full_page_plugin_for_types: application/pdf
plugins.ctprollout.cohort: user-changed-from-test
plugins.ctprollout.cohortSample: 0.480091
print.printer_Foxit_Reader_PDF_Printer.print_bgcolor: false
print.printer_Foxit_Reader_PDF_Printer.print_bgimages: false
print.printer_Foxit_Reader_PDF_Printer.print_duplex: -437918235
print.printer_Foxit_Reader_PDF_Printer.print_edge_bottom: 0
print.printer_Foxit_Reader_PDF_Printer.print_edge_left: 0
print.printer_Foxit_Reader_PDF_Printer.print_edge_right: 0
print.printer_Foxit_Reader_PDF_Printer.print_edge_top: 0
print.printer_Foxit_Reader_PDF_Printer.print_evenpages: true
print.printer_Foxit_Reader_PDF_Printer.print_footercenter:
print.printer_Foxit_Reader_PDF_Printer.print_footerleft: &PT
print.printer_Foxit_Reader_PDF_Printer.print_footerright: &D
print.printer_Foxit_Reader_PDF_Printer.print_headercenter:
print.printer_Foxit_Reader_PDF_Printer.print_headerleft: &T
print.printer_Foxit_Reader_PDF_Printer.print_headerright: &U
print.printer_Foxit_Reader_PDF_Printer.print_in_color: true
print.printer_Foxit_Reader_PDF_Printer.print_margin_bottom: 0.5
print.printer_Foxit_Reader_PDF_Printer.print_margin_left: 0.5
print.printer_Foxit_Reader_PDF_Printer.print_margin_right: 0.5
print.printer_Foxit_Reader_PDF_Printer.print_margin_top: 0.5
print.printer_Foxit_Reader_PDF_Printer.print_oddpages: true
print.printer_Foxit_Reader_PDF_Printer.print_orientation: 1
print.printer_Foxit_Reader_PDF_Printer.print_page_delay: 50
print.printer_Foxit_Reader_PDF_Printer.print_paper_data: 1
print.printer_Foxit_Reader_PDF_Printer.print_paper_height: 11.00
print.printer_Foxit_Reader_PDF_Printer.print_paper_name:
print.printer_Foxit_Reader_PDF_Printer.print_paper_size_unit: 0
print.printer_Foxit_Reader_PDF_Printer.print_paper_width: 8.50
print.printer_Foxit_Reader_PDF_Printer.print_resolution: 600
print.printer_Foxit_Reader_PDF_Printer.print_reversed: false
print.printer_Foxit_Reader_PDF_Printer.print_scaling: 1.00
print.printer_Foxit_Reader_PDF_Printer.print_shrink_to_fit: true
print.printer_Foxit_Reader_PDF_Printer.print_to_file: false
print.printer_Foxit_Reader_PDF_Printer.print_unwriteable_margin_bottom: 0
print.printer_Foxit_Reader_PDF_Printer.print_unwriteable_margin_left: 0
print.printer_Foxit_Reader_PDF_Printer.print_unwriteable_margin_right: 0
print.printer_Foxit_Reader_PDF_Printer.print_unwriteable_margin_top: 0
privacy.history.custom: true
security.sandbox.content.tempDirSuffix: {a1bbb4f8-de3e-466f-82a7-8d14ac8955bc}
services.sync.declinedEngines: forms,history,prefs,tabs,addons
services.sync.engine.addons: false
services.sync.engine.history: false
services.sync.engine.prefs: false
services.sync.engine.prefs.modified: false
services.sync.engine.tabs: false
services.sync.lastPing: 1511056835
services.sync.lastSync: Sun Nov 19 2017 12:44:09 GMT-0600 (Central Standard Time)
services.sync.numClients: 3
storage.vacuum.last.index: 1
storage.vacuum.last.places.sqlite: 1510204469
ui.osk.debug.keyboardDisplayReason: IKPOS: Touch screen not found.

Important Locked Preferences
----------------------------

Places Database
---------------

JavaScript
----------

Incremental GC: true

Accessibility
-------------

Activated: false
Prevent Accessibility: 1
Accessible Handler Used: true
Accessibility Instantiator:

Library Versions
----------------

NSPR
Expected minimum version: 4.17
Version in use: 4.17

NSS
Expected minimum version: 3.33
Version in use: 3.33

NSSSMIME
Expected minimum version: 3.33
Version in use: 3.33

NSSSSL
Expected minimum version: 3.33
Version in use: 3.33

NSSUTIL
Expected minimum version: 3.33
Version in use: 3.33

Experimental Features
---------------------

Sandbox
-------

Content Process Sandbox Level: 3
Effective Content Process Sandbox Level: 3

Comment 1

[Jim Mathies [:jimm]]

This is known, bug 1418290 tracks some of the client issues we've found.