I enabled accessibility by adding ac_add_options --enable-accessibility to my mozconfig. Everything built successfully. When running Firefox, parent process accessibility works correctly. However, content processes crash immediately due to a problem with the COM interceptor. I'm filing a dependent bug for that.

Could this also cause mochitest-devtools to report failures with the accessibility feature?

Treeherder: https://treeherder.mozilla.org/#/jobs?repo=try&revision=7f2edbc029097dc7ca3c14f2ae488e4d7275d147&group_state=expanded&selectedJob=227256225

Taskcluster logs: https://taskcluster-artifacts.net/Alu4Z_EKRpOcbl78TwpVZA/0/public/logs/live_backing.log

This is repeated a good number of times:

PROCESS-CRASH | devtools/client/accessibility/test/browser/browser_accessibility_context_menu_browser.js | application crashed [None]

Accessibility is currently disabled for AARCH64. I can understand failures, but crashes seem weird. Copying Yura for awareness. That said, I honestly think trying to debug any accessibility test issues at all on AARCH64 is not a good use of time until we can get accessibility working properly.

Oops, didn't mean to NI Yura, just CC him. :)

I don't know what changed (some other fix in central? A Windows update?), but I just built against latest central with accessibility enabled and everything works as expected, no COM interceptor crash. The handler works, too (I registered it manually; haven't tested the installer yet). My NVDA changes mean that NVDA even renders content documents just as expected. Things are a bit sluggish, but we can look at optimisation later, and some of that is probably on the NVDA side.

Try run:
https://treeherder.mozilla.org/#/jobs?repo=try&revision=15f833ba7d220afbe3a26859590777b5f8179502
I tested the installer. All works as expected, including registration of the handler.

Accessibility now compiles and works, so we can re-enable it!
This just backs out the moz.configure part of 02cd44e39566.

https://hg.mozilla.org/mozilla-central/rev/13fa3e2aead6

:jamie - to clarify, windows10-aarch64 builds now have a11y enabled by default, correct? I am seeing a11y failures in https://treeherder.mozilla.org/#/jobs?repo=try&revision=4509120a98998411afb100b004769f4bf917da74 under bc3 that suggest it is not enabled for win10-aarch64.

(In reply to Edwin Gao (:egao) from comment #11)

:jamie - to clarify, windows10-aarch64 builds now have a11y enabled by default, correct?

In central (Nightly/67), yes. Note that this has not been uplifted. I mention this because I vaguely recall we're testing against 66 for ARM64, but a) I could be wrong or b) that might not apply here.

I am seeing a11y failures in https://treeherder.mozilla.org/#/jobs?repo=try&revision=4509120a98998411afb100b004769f4bf917da74 under bc3 that suggest it is not enabled for win10-aarch64.

It looks like a11y is being initialised by default, which the test doesn't expect. (A11y can be "enabled" in the build, but it isn't initialised unless a client tries to use it or we force initialise it.)

Yura, any ideas why this might happen?
Edwin, are we doing anything different in terms of how we run tests for aarch64 vs Intel Windows? For example, might this test run in the same session as other tests on aarch64 where that isn't the case on other platforms? I'm wondering whether some other a11y test ends up running first on aarch64, which would init a11y, which we don't expect.

(In reply to James Teh [:Jamie] from comment #12)

(In reply to Edwin Gao (:egao) from comment #11)

:jamie - to clarify, windows10-aarch64 builds now have a11y enabled by default, correct?

In central (Nightly/67), yes. Note that this has not been uplifted. I mention this because I vaguely recall we're testing against 66 for ARM64, but a) I could be wrong or b) that might not apply here.

I am seeing a11y failures in https://treeherder.mozilla.org/#/jobs?repo=try&revision=4509120a98998411afb100b004769f4bf917da74 under bc3 that suggest it is not enabled for win10-aarch64.

It looks like a11y is being initialised by default, which the test doesn't expect. (A11y can be "enabled" in the build, but it isn't initialised unless a client tries to use it or we force initialise it.)

Yura, any ideas why this might happen?

Yeah, this is most likely due to some other test or something in the environment that starts accessibility service.

Edwin, are we doing anything different in terms of how we run tests for aarch64 vs Intel Windows? For example, might this test run in the same session as other tests on aarch64 where that isn't the case on other platforms? I'm wondering whether some other a11y test ends up running first on aarch64, which would init a11y, which we don't expect.

(In reply to James Teh [:Jamie] from comment #12)

In central (Nightly/67), yes. Note that this has not been uplifted. I mention this because I vaguely recall we're testing against 66 for ARM64, but a) I could be wrong or b) that might not apply here.

CI is running against mozilla-central; the QA team is testing against 66 I believe.

Edwin, are we doing anything different in terms of how we run tests for aarch64 vs Intel Windows? For example, might this test run in the same session as other tests on aarch64 where that isn't the case on other platforms? I'm wondering whether some other a11y test ends up running first on aarch64, which would init a11y, which we don't expect.

As far as I am aware, we are not doing anything differently for mochitest-a11y and mochitest-browser-chrome on windows10-aarch64. I personally haven't made any modifications to the test execution order nor have I disabled any tests, if that provides context.

Machine wise, these are consumer hardware, Lenovo C630 YOGA laptops running Windows 10, just on ARM64 architecture instead. Build was artifact build, from mozilla-central taken on 2019/02/22.

I did compare one test that was failing on windows10-aarch64, browser/base/content/test/tabs/browser_accessibility_indicator.js. I noted the below:

mochitest-browser-chrome chunk:

• windows10-aarch64/opt: 3 log
• windows10-x64/opt: 2 log

execution time:

• windows10-aarch64/opt: 45100ms
• windows10-x64/opt: 1919ms

What else could I look into? Could the chunking of tests be the issue?

There's another possibility. Given that this is consumer hardware, I wonder whether some tool installed on the machine (even part of Windows?) is activating a11y. Is there a way we can get the info from about:support to show up somewhere around that test?

(In reply to James Teh [:Jamie] from comment #15)

There's another possibility. Given that this is consumer hardware, I wonder whether some tool installed on the machine (even part of Windows?) is activating a11y. Is there a way we can get the info from about:support to show up somewhere around that test?

I have the windows10-aarch64 hardware locally, and this is what shows up when I access about:support.

{
  "application": {
    "name": "Firefox",
    "osVersion": "Windows_NT 10.0",
    "version": "67.0a1",
    "buildID": "20190225215823",
    "userAgent": "Mozilla/5.0 (Windows NT 10.0; rv:67.0) Gecko/20100101 Firefox/67.0",
    "safeMode": false,
    "updateChannel": "nightly",
    "supportURL": "https://support.mozilla.org/1/firefox/67.0a1/WINNT/en-US/",
    "numTotalWindows": 1,
    "numRemoteWindows": 1,
    "launcherProcessState": 0,
    "remoteAutoStart": true,
    "currentContentProcesses": 4,
    "maxContentProcesses": 8,
    "autoStartStatus": 1,
    "policiesStatus": 0,
    "keyGoogleFound": true,
    "keyMozillaFound": true
  },
  "securitySoftware": {
    "registeredAntiVirus": "Windows Defender Antivirus",
    "registeredAntiSpyware": "Windows Defender Antivirus",
    "registeredFirewall": "Windows Firewall"
  },
  "modifiedPreferences": {
    "accessibility.typeaheadfind.flashBar": 0,
    "browser.cache.disk.capacity": 1048576,
    "browser.cache.disk.filesystem_reported": 1,
    "browser.sessionstore.upgradeBackup.latestBuildID": "20190225215823",
    "browser.startup.homepage_override.buildID": "20190225215823",
    "browser.startup.homepage_override.mstone": "67.0a1",
    "browser.urlbar.placeholderName": "DuckDuckGo",
    "browser.urlbar.timesBeforeHidingSuggestionsHint": 0,
    "dom.forms.autocomplete.formautofill": true,
    "dom.push.userAgentID": "324636416a134422a9d8fc1f2b9e261f",
    "extensions.lastAppVersion": "67.0a1",
    "font.internaluseonly.changed": false,
    "idle.lastDailyNotification": 1551359088,
    "layers.mlgpu.sanity-test-failed": false,
    "media.gmp-manager.buildID": "20190225102402",
    "media.gmp-manager.lastCheck": 1551206916,
    "media.gmp.storage.version.observed": 1,
    "media.hardware-video-decoding.failed": false,
    "network.dns.disablePrefetch": true,
    "network.http.speculative-parallel-limit": 0,
    "network.predictor.cleaned-up": true,
    "network.predictor.enabled": false,
    "network.prefetch-next": false,
    "places.history.expiration.transient_current_max_pages": 142470,
    "places.database.lastMaintenance": 1551115326,
    "plugin.disable_full_page_plugin_for_types": "application/pdf",
    "privacy.sanitize.pending": "[{\"id\":\"newtab-container\",\"itemsToClear\":[],\"options\":{}}]",
    "privacy.donottrackheader.enabled": true,
    "privacy.userContext.extension": "@contain-facebook",
    "security.remote_settings.intermediates.checked": 1551206727,
    "security.sandbox.content.tempDirSuffix": "{fe2d3b33-7a73-4ae3-8b8e-c96004bd5f77}",
    "security.sandbox.plugin.tempDirSuffix": "{e50aea49-f856-4f1d-92c5-b6cfd28d021d}",
    "services.sync.declinedEngines": "",
    "services.sync.lastPing": 1551297292,
    "services.sync.lastSync": "Thu Feb 28 2019 10:58:02 GMT-0800 (Pacific Standard Time)",
    "services.sync.engine.addresses.available": true,
    "services.sync.engine.bookmarks.validation.lastTime": 1551380140,
    "services.sync.engine.passwords.validation.lastTime": 1551380140,
    "services.sync.engine.prefs.modified": false,
    "signon.importedFromSqlite": true,
    "storage.vacuum.last.index": 1,
    "storage.vacuum.last.places.sqlite": 1549058100,
    "ui.osk.debug.keyboardDisplayReason": "AIOSKIDM: failed reading value of regkey."
  },
  "lockedPreferences": {},
  "media": {
    "currentAudioBackend": "wasapi",
    "currentMaxAudioChannels": 2,
    "currentPreferredSampleRate": 48000,
    "audioOutputDevices": [
      {
        "name": "Headphones (Qualcomm(R) Aqstic(TM))",
        "groupId": "AUDD\\VEN_QCOM&DEV_0262&SUBSYS_LNEP5801\\6&399a05d&0&1",
        "vendor": "",
        "type": 2,
        "state": 1,
        "preferred": 0,
        "supportedFormat": 4112,
        "defaultFormat": 4096,
        "maxChannels": 0,
        "defaultRate": 0,
        "maxRate": 0,
        "minRate": 0,
        "maxLatency": 0,
        "minLatency": 0
      },
      {
        "name": "Speakers (Qualcomm(R) Aqstic(TM))",
        "groupId": "AUDD\\VEN_QCOM&DEV_0262&SUBSYS_LNEP5801\\6&399a05d&0&1",
        "vendor": "",
        "type": 2,
        "state": 2,
        "preferred": 7,
        "supportedFormat": 4112,
        "defaultFormat": 4096,
        "maxChannels": 2,
        "defaultRate": 48000,
        "maxRate": 48000,
        "minRate": 48000,
        "maxLatency": 480,
        "minLatency": 144
      }
    ],
    "audioInputDevices": [
      {
        "name": "Internal Microphone (Qualcomm(R) Aqstic(TM))",
        "groupId": "AUDD\\VEN_QCOM&DEV_0262&SUBSYS_LNEP5801\\6&399a05d&0&1",
        "vendor": "",
        "type": 1,
        "state": 2,
        "preferred": 0,
        "supportedFormat": 4112,
        "defaultFormat": 4096,
        "maxChannels": 1,
        "defaultRate": 48000,
        "maxRate": 48000,
        "minRate": 48000,
        "maxLatency": 480,
        "minLatency": 144
      },
      {
        "name": "Internal Microphone Array - Front (Qualcomm(R) Aqstic(TM))",
        "groupId": "AUDD\\VEN_QCOM&DEV_0262&SUBSYS_LNEP5801\\6&399a05d&0&1",
        "vendor": "",
        "type": 1,
        "state": 2,
        "preferred": 7,
        "supportedFormat": 4112,
        "defaultFormat": 4096,
        "maxChannels": 2,
        "defaultRate": 48000,
        "maxRate": 48000,
        "minRate": 48000,
        "maxLatency": 480,
        "minLatency": 144
      },
      {
        "name": "Headset Microphone (Qualcomm(R) Aqstic(TM))",
        "groupId": "AUDD\\VEN_QCOM&DEV_0262&SUBSYS_LNEP5801\\6&399a05d&0&1",
        "vendor": "",
        "type": 1,
        "state": 1,
        "preferred": 0,
        "supportedFormat": 4112,
        "defaultFormat": 4096,
        "maxChannels": 0,
        "defaultRate": 0,
        "maxRate": 0,
        "minRate": 0,
        "maxLatency": 0,
        "minLatency": 0
      }
    ]
  },
  "javaScript": {
    "incrementalGCEnabled": true
  },
  "accessibility": {
    "isActive": true,
    "forceDisabled": 0,
    "handlerUsed": true,
    "instantiator": "UNKNOWN|"
  },
  "libraryVersions": {
    "NSPR": {
      "minVersion": "4.21 Beta",
      "version": "4.21 Beta"
    },
    "NSS": {
      "minVersion": "3.43 Beta",
      "version": "3.43 Beta"
    },
    "NSSUTIL": {
      "minVersion": "3.43 Beta",
      "version": "3.43 Beta"
    },
    "NSSSSL": {
      "minVersion": "3.43 Beta",
      "version": "3.43 Beta"
    },
    "NSSSMIME": {
      "minVersion": "3.43 Beta",
      "version": "3.43 Beta"
    }
  },
  "userJS": {
    "exists": false
  },
  "intl": {
    "localeService": {
      "requested": [
        "en-US"
      ],
      "available": [
        "en-US"
      ],
      "supported": [
        "en-US"
      ],
      "regionalPrefs": [
        "en-CA"
      ],
      "defaultLocale": "en-US"
    },
    "osPrefs": {
      "systemLocales": [
        "en-US"
      ],
      "regionalPrefsLocales": [
        "en-CA"
      ]
    }
  },
  "crashes": {
    "submitted": [],
    "pending": 0
  },
  "sandbox": {
    "contentSandboxLevel": 2,
    "effectiveContentSandboxLevel": 2
  },
  "graphics": {
    "numTotalWindows": 1,
    "numAcceleratedWindows": 1,
    "windowLayerManagerType": "Direct3D 11",
    "windowLayerManagerRemote": true,
    "windowUsingAdvancedLayers": true,
    "adapterDescription": "Qualcomm(R) Adreno(TM) 630 GPU",
    "adapterVendorID": "0x5143",
    "adapterDeviceID": "0x027e",
    "adapterSubsysID": "0000000c",
    "adapterRAM": "0",
    "adapterDrivers": "qcdx11arm64um850 qcdx11arm64um850 qcdx11arm64um850 qcdx12arm64um850",
    "driverVersion": "23.18.9310.0",
    "driverDate": "10-16-2018",
    "adapterDescription2": "Qualcomm(R) Adreno(TM) 630 GPU",
    "adapterVendorID2": "0x00ac",
    "adapterDeviceID2": "0x00ac",
    "adapterSubsysID2": "000000ac",
    "adapterRAM2": "0",
    "adapterDrivers2": "qcdx11arm64um850 qcdx11arm64um850 qcdx11arm64um850 qcdx12arm64um850",
    "driverVersion2": "23.18.9310.0",
    "driverDate2": "10-16-2018",
    "isGPU2Active": false,
    "direct2DEnabled": false,
    "directWriteEnabled": true,
    "directWriteVersion": "10.0.17134.471",
    "clearTypeParameters": "Gamma: 1.8 Pixel Structure: RGB ClearType Level: 100 Enhanced Contrast: 50 ",
    "usesTiling": false,
    "contentUsesTiling": true,
    "offMainThreadPaintEnabled": true,
    "offMainThreadPaintWorkerCount": 4,
    "lowEndMachine": false,
    "targetFrameRate": 60,
    "direct2DEnabledMessage": {
      "key": "blocked-driver"
    },
    "webgl1Renderer": "Google Inc. -- ANGLE (Qualcomm(R) Adreno(TM) 630 GPU Direct3D11 vs_5_0 ps_5_0)",
    "webgl1Version": "OpenGL ES 2.0 (ANGLE 2.1.0.eff6bfdb1db9)",
    "webgl1DriverExtensions": "GL_ANGLE_client_arrays GL_ANGLE_depth_texture GL_ANGLE_explicit_context GL_ANGLE_explicit_context_gles1 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_program_cache_control 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_color_buffer_float_rgb GL_CHROMIUM_color_buffer_float_rgba 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_compression_s3tc_srgb 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_KHR_parallel_shader_compile GL_KHR_robust_buffer_access_behavior 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_surfaceless_context 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 OES_compressed_EAC_R11_signed_texture OES_compressed_EAC_R11_unsigned_texture OES_compressed_EAC_RG11_signed_texture OES_compressed_EAC_RG11_unsigned_texture OES_compressed_ETC2_RGB8_texture OES_compressed_ETC2_RGBA8_texture OES_compressed_ETC2_punchthroughA_RGBA8_texture OES_compressed_ETC2_punchthroughA_sRGB8_alpha_texture OES_compressed_ETC2_sRGB8_alpha8_texture OES_compressed_ETC2_sRGB8_texture ",
    "webgl1Extensions": "ANGLE_instanced_arrays EXT_blend_minmax EXT_color_buffer_half_float EXT_disjoint_timer_query EXT_frag_depth EXT_shader_texture_lod EXT_sRGB EXT_texture_filter_anisotropic 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_compressed_texture_s3tc_srgb WEBGL_debug_renderer_info WEBGL_debug_shaders WEBGL_depth_texture WEBGL_draw_buffers WEBGL_lose_context",
    "webgl1WSIInfo": "EGL_VENDOR: Google Inc. (adapter LUID: 000000000000be4a)\nEGL_VERSION: 1.4 (ANGLE 2.1.0.eff6bfdb1db9)\nEGL_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 EGL_ANGLE_create_context_webgl_compatibility EGL_CHROMIUM_create_context_bind_generates_resource EGL_CHROMIUM_sync_control EGL_EXT_pixel_format_float EGL_KHR_surfaceless_context EGL_ANGLE_display_texture_share_group EGL_ANGLE_create_context_client_arrays EGL_ANGLE_program_cache_control EGL_ANGLE_robust_resource_initialization EGL_ANGLE_create_context_extensions_enabled EGL_MOZ_create_context_provoking_vertex_dont_care \nEGL_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 EGL_KHR_debug EGL_ANGLE_explicit_context ",
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    "webgl2Version": "OpenGL ES 3.0 (ANGLE 2.1.0.eff6bfdb1db9)",
    "webgl2DriverExtensions": "GL_ANGLE_client_arrays GL_ANGLE_depth_texture GL_ANGLE_explicit_context GL_ANGLE_explicit_context_gles1 GL_ANGLE_framebuffer_blit GL_ANGLE_framebuffer_multisample GL_ANGLE_instanced_arrays GL_ANGLE_lossy_etc_decode GL_ANGLE_multiview GL_ANGLE_pack_reverse_row_order GL_ANGLE_program_cache_control 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_color_buffer_float_rgb GL_CHROMIUM_color_buffer_float_rgba 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_compression_s3tc_srgb 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_KHR_parallel_shader_compile GL_KHR_robust_buffer_access_behavior 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_surfaceless_context 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 OES_compressed_EAC_R11_signed_texture OES_compressed_EAC_R11_unsigned_texture OES_compressed_EAC_RG11_signed_texture OES_compressed_EAC_RG11_unsigned_texture OES_compressed_ETC2_RGB8_texture OES_compressed_ETC2_RGBA8_texture OES_compressed_ETC2_punchthroughA_RGBA8_texture OES_compressed_ETC2_punchthroughA_sRGB8_alpha_texture OES_compressed_ETC2_sRGB8_alpha8_texture OES_compressed_ETC2_sRGB8_texture ",
    "webgl2Extensions": "EXT_color_buffer_float EXT_disjoint_timer_query EXT_texture_filter_anisotropic OES_texture_float_linear WEBGL_compressed_texture_s3tc WEBGL_compressed_texture_s3tc_srgb WEBGL_debug_renderer_info WEBGL_debug_shaders WEBGL_lose_context",
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    "info": {
      "AzureCanvasBackend (UI Process)": "skia",
      "AzureFallbackCanvasBackend (UI Process)": "cairo",
      "AzureContentBackend (UI Process)": "skia",
      "AzureCanvasBackend": "skia",
      "AzureContentBackend": "skia",
      "AzureCanvasAccelerated": 0,
      "ApzWheelInput": 1,
      "ApzTouchInput": 1,
      "ApzDragInput": 1,
      "ApzKeyboardInput": 1,
      "ApzAutoscrollInput": 1
    },
    "featureLog": {
      "features": [
        {
          "name": "HW_COMPOSITING",
          "description": "Compositing",
          "status": "available",
          "log": [
            {
              "type": "default",
              "status": "available"
            }
          ]
        },
        {
          "name": "D3D11_COMPOSITING",
          "description": "Direct3D11 Compositing",
          "status": "available",
          "log": [
            {
              "type": "default",
              "status": "available"
            }
          ]
        },
        {
          "name": "DIRECT2D",
          "description": "Direct2D",
          "status": "blacklisted",
          "log": [
            {
              "type": "default",
              "status": "available"
            },
            {
              "type": "env",
              "status": "blacklisted",
              "message": "#BLOCKLIST_FEATURE_FAILURE_QUALCOMM"
            }
          ]
        },
        {
          "name": "D3D11_HW_ANGLE",
          "description": "Direct3D11 hardware ANGLE",
          "status": "available",
          "log": [
            {
              "type": "default",
              "status": "available"
            }
          ]
        },
        {
          "name": "GPU_PROCESS",
          "description": "GPU Process",
          "status": "available",
          "log": [
            {
              "type": "default",
              "status": "available"
            }
          ]
        },
        {
          "name": "WEBRENDER",
          "description": "WebRender",
          "status": "opt-in",
          "log": [
            {
              "type": "default",
              "status": "opt-in",
              "message": "WebRender is an opt-in feature"
            }
          ]
        },
        {
          "name": "WEBRENDER_QUALIFIED",
          "description": "WebRender qualified",
          "status": "blocked",
          "log": [
            {
              "type": "default",
              "status": "available"
            },
            {
              "type": "env",
              "status": "blocked",
              "message": "Has battery"
            }
          ]
        },
        {
          "name": "OMTP",
          "description": "Off Main Thread Painting",
          "status": "available",
          "log": [
            {
              "type": "default",
              "status": "available"
            }
          ]
        },
        {
          "name": "ADVANCED_LAYERS",
          "description": "Advanced Layers",
          "status": "available",
          "log": [
            {
              "type": "default",
              "status": "available"
            }
          ]
        }
      ],
      "fallbacks": []
    },
    "crashGuards": []
  },
  "extensions": [
    {
      "name": "DuckDuckGo Privacy Essentials",
      "version": "2019.1.31",
      "isActive": true,
      "id": "jid1-ZAdIEUB7XOzOJw@jetpack"
    },
    {
      "name": "Enhancer for YouTube™",
      "version": "2.0.84",
      "isActive": true,
      "id": "enhancerforyoutube@maximerf.addons.mozilla.org"
    },
    {
      "name": "Facebook Container",
      "version": "1.4.2",
      "isActive": true,
      "id": "@contain-facebook"
    },
    {
      "name": "Firefox Multi-Account Containers",
      "version": "6.1.0",
      "isActive": true,
      "id": "@testpilot-containers"
    },
    {
      "name": "In-Page Pop-up Reporter",
      "version": "1.6",
      "isActive": true,
      "id": "{feb799e2-29e2-4e35-b862-cc4e1842b6f5}"
    },
    {
      "name": "LastPass: Free Password Manager",
      "version": "4.24.0.5",
      "isActive": true,
      "id": "support@lastpass.com"
    },
    {
      "name": "Privacy Possum",
      "version": "2018.8.31",
      "isActive": true,
      "id": "woop-NoopscooPsnSXQ@jetpack"
    },
    {
      "name": "RescueTime for Firefox",
      "version": "3.2.3",
      "isActive": true,
      "id": "rescuetime_firefox@rescuetime.com"
    },
    {
      "name": "Right Links WE",
      "version": "0.5b8",
      "isActive": true,
      "id": "{B5F5E8D3-AE31-49A1-AC42-78B7B1CC5CDC}"
    },
    {
      "name": "uBlock Origin",
      "version": "1.18.4",
      "isActive": true,
      "id": "uBlock0@raymondhill.net"
    },
    {
      "name": "Web Scrobbler",
      "version": "2.14.0",
      "isActive": true,
      "id": "{799c0914-748b-41df-a25c-22d008f9e83f}"
    },
    {
      "name": "Ad Analysis for Facebook - DISABLED",
      "version": "1.1.0",
      "isActive": false,
      "id": "AdAnalysisForFacebook@firefox.com"
    },
    {
      "name": "Right Click Opens Link New Tab Correct Order",
      "version": "0.0.8",
      "isActive": false,
      "id": "rightclicknewtab@bgdam.com"
    },
    {
      "name": "Tree Style Tab",
      "version": "2.7.23",
      "isActive": false,
      "id": "treestyletab@piro.sakura.ne.jp"
    },
    {
      "name": "Vidyo Replay Download",
      "version": "1.4",
      "isActive": false,
      "id": "{522ada98-fe79-4881-93ab-b7ace8c7d7c4}"
    }
  ],
  "features": [
    {
      "name": "Firefox Monitor",
      "version": "3.0",
      "id": "fxmonitor@mozilla.org"
    },
    {
      "name": "Firefox Screenshots",
      "version": "37.1.0",
      "id": "screenshots@mozilla.org"
    },
    {
      "name": "Form Autofill",
      "version": "1.0",
      "id": "formautofill@mozilla.org"
    },
    {
      "name": "Web Compat",
      "version": "3.0.0",
      "id": "webcompat@mozilla.org"
    },
    {
      "name": "WebCompat Reporter",
      "version": "1.1.0",
      "id": "webcompat-reporter@mozilla.org"
    }
  ]
}

"accessibility": {
"isActive": true,
...
"instantiator": "UNKNOWN|"

Ug. That's unfortunate. So something is triggering a11y, but we have no idea what.

I'd be curious to know if this happens when the test is run in headless mode.

In the short term, I think we should just disable the indicator test for Windows aarch64. Even if we figure out what's triggering a11y on these machines, we may not be able to block it without killing valid use cases.

(In reply to James Teh [:Jamie] from comment #17)

Ug. That's unfortunate. So something is triggering a11y, but we have no idea what.

I filed bug 1531537 to investigate this.