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Speedtest.net upload fails and wireless network disconnects ONLY with Firefox

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  • Last reply by Pete

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Firefox 80.0 (64-bit), Windows 10 Pro 64-bit Insider build Version 20H2 (OS Build 19042.487) This just started in the last 30 days or so. When run a speedtest in FF, the download speed is significantly lower that in a different browser, and more importantly, the upload test fails, and my wireless network disconnects. I have checked my network logs and I see no blocking taking place. I disabled DoH in FF settings and experienced the same results. Please observe screenshots, below. Note, I first noticed this in Version 79, but it's possible that it began earlier. I don't run speed tests frequently. Site = https://www.speedtest.net/ Connections = Multi Photos 1 & 2 are from within Firefox. Photo # 3 shows the identical test run on the same PC from Vivaldi Browser. I have tested after disabling extensions, and even from a private window, all with the same resuls. Please advise. Thank you! Pete M.

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Application Basics


Name: Firefox Version: 80.0 Build ID: 20200818235255 Distribution ID: Update Channel: release User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:80.0) Gecko/20100101 Firefox/80.0 OS: Windows_NT 10.0 19042 Launcher Process: Enabled Multiprocess Windows: 1/1 Enabled by default Remote Processes: 6 Enterprise Policies: Inactive Google Location Service Key: Found Google Safebrowsing Key: Found Mozilla Location Service Key: Found Safe Mode: false

Firefox Features


Name: DoH Roll-Out Version: 2.0.0 ID: doh-rollout@mozilla.org Name: Firefox Screenshots Version: 39.0.0 ID: screenshots@mozilla.org Name: Form Autofill Version: 1.0 ID: formautofill@mozilla.org Name: Web Compat Version: 13.0.1 ID: webcompat@mozilla.org Name: WebCompat Reporter Version: 1.3.0 ID: webcompat-reporter@mozilla.org Remote Processes


Type: Web Content Count: 2 / 8 Type: Extension Count: 1 Type: Privileged About Count: 1 Type: Preallocated Count: 1 Type: GPU Count: 1 Add-ons


Name: Amazon.com Type: extension Version: 1.1 Enabled: true ID: amazondotcom@search.mozilla.org Name: Auto Reload Tab Type: extension Version: 0.5 Enabled: true ID: {0ed335eb-9779-4d7f-b9d8-7ec2e96a1f43} Name: Bing Type: extension Version: 1.1 Enabled: true ID: bing@search.mozilla.org Name: DuckDuckGo Type: extension Version: 1.0 Enabled: true ID: ddg@search.mozilla.org Name: Easy Youtube Video Downloader Express Type: extension Version: 16.6 Enabled: true ID: {b9acf540-acba-11e1-8ccb-001fd0e08bd4} Name: eBay Type: extension Version: 1.1 Enabled: true ID: ebay@search.mozilla.org Name: Enhancer for YouTube™ Type: extension Version: 2.0.101 Enabled: true ID: enhancerforyoutube@maximerf.addons.mozilla.org Name: Facebook Container Type: extension Version: 2.1.1 Enabled: true ID: @contain-facebook Name: FoxyTab Type: extension Version: 2.15 Enabled: true ID: foxytab@eros.man Name: Google Type: extension Version: 1.0 Enabled: true ID: google@search.mozilla.org Name: LastPass: Free Password Manager Type: extension Version: 4.54.0.2 Enabled: true ID: support@lastpass.com Name: Privacy Badger Type: extension Version: 2020.8.25 Enabled: true ID: jid1-MnnxcxisBPnSXQ@jetpack Name: Social Fixer for Facebook Type: extension Version: 25.0.0 Enabled: true ID: betterfacebook@mattkruse.com Name: uBlock Origin Type: extension Version: 1.29.2 Enabled: true ID: uBlock0@raymondhill.net Name: Video DownloadHelper Type: extension Version: 7.3.9 Enabled: true ID: {b9db16a4-6edc-47ec-a1f4-b86292ed211d} Name: Wikipedia (en) Type: extension Version: 1.0 Enabled: true ID: wikipedia@search.mozilla.org Security Software


Type: Microsoft Defender Antivirus Type: Type: Windows Firewall 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: 0000000000009aee) EGL_VERSION: 1.4 (ANGLE 2.1.0.6c72b64f910d) 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 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_ANDROID_blob_cache EGL_ANDROID_recordable EGL_ANGLE_image_d3d11_texture EGL_ANGLE_create_context_backwards_compatible 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 EGL_KHR_debug EGL_ANGLE_explicit_context EGL_ANGLE_feature_control WebGL 1 Driver Renderer: Google Inc. -- ANGLE (NVIDIA GeForce 9500 GT Direct3D11 vs_4_0 ps_4_0) WebGL 1 Driver Version: OpenGL ES 2.0.0 (ANGLE 2.1.0.6c72b64f910d) WebGL 1 Driver Extensions: 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_memory_size GL_ANGLE_multi_draw GL_ANGLE_pack_reverse_row_order GL_ANGLE_program_cache_control GL_ANGLE_provoking_vertex 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_lose_context GL_CHROMIUM_sync_query GL_EXT_blend_func_extended 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_float_blend GL_EXT_frag_depth GL_EXT_instanced_arrays 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_depth24 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_3D GL_OES_texture_border_clamp 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 WebGL 1 Extensions: ANGLE_instanced_arrays EXT_blend_minmax EXT_color_buffer_half_float EXT_float_blend EXT_frag_depth EXT_shader_texture_lod EXT_sRGB EXT_texture_filter_anisotropic MOZ_debug 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 WebGL 2 Driver WSI Info: - WebGL 2 Driver Renderer: WebGL creation failed: * tryANGLE * Exhausted GL driver options. WebGL 2 Driver Version: - WebGL 2 Driver Extensions: - WebGL 2 Extensions: - Direct2D: true Off Main Thread Painting Enabled: true Off Main Thread Painting Worker Count: 3 Target Frame Rate: 60 DirectWrite: true (10.0.19041.388) GPU #1 Active: Yes Description: NVIDIA GeForce 9500 GT Vendor ID: 0x10de Device ID: 0x0640 Driver Version: 21.21.13.4201 Driver Date: 11-14-2016 Drivers: nvd3dumx,nvwgf2umx,nvwgf2umx nvd3dum,nvwgf2um,nvwgf2um Subsys ID: 00000000 RAM: 1024 GPU #2 Active: No RAM: 0 Diagnostics AzureCanvasBackend: direct2d 1.1 AzureCanvasBackend (UI Process): skia AzureContentBackend: direct2d 1.1 AzureContentBackend (UI Process): skia AzureFallbackCanvasBackend (UI Process): none CMSOutputProfile: 102834 bytes, too large Display0: 1680x1050@59Hz Display1: 1680x1050@60Hz DisplayCount: 2 GPUProcessPid: 7360 ClearType Parameters: \\.\DISPLAY1 [ Gamma: 2.2 Pixel Structure: RGB ClearType Level: 100 Enhanced Contrast: 300 ] \\.\DISPLAY2 [ Gamma: 2.2 Pixel Structure: RGB ClearType Level: 100 Enhanced Contrast: 200 ] Decision Log HW_COMPOSITING: available by default D3D11_COMPOSITING: available by default DIRECT2D: available by default D3D11_HW_ANGLE: available by default GPU_PROCESS: available by default WEBRENDER: opt-in by default: WebRender is an opt-in feature WEBRENDER_QUALIFIED: available by default denied by env: Not on allowlist WEBRENDER_COMPOSITOR: available by default unavailable by runtime: No DirectComposition usage WEBRENDER_ANGLE: opt-in by default: WebRender ANGLE is an opt-in feature WEBRENDER_DCOMP_PRESENT: opt-in by default: WebRender DirectComposition is an opt-in feature OMTP: available by default ADVANCED_LAYERS: available by default WEBGPU: disabled by default: Disabled by default blocked by runtime: WebGPU can only be enabled in nightly Media


Audio Backend: wasapi Max Channels: 2 Preferred Sample Rate: 48000 Roundtrip latency (standard deviation): 51.42ms (4.18) Output Devices Name: Group Speakers (Realtek High Definition Audio): HDAUDIO\F

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Hi,

please change the UserAgent string to mimic Chrome or Edge browser and run the test again.

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INTERESTING! Yes, changing the user agent resolved this. When I changed it back and tested again, the same thing occurred, and it disabled my 5GHZ wireless network connection again. This is quite frustrating.

Furthermore, testing over the 2.4 GHZ wireless network connection with the default agent works properly with no network interruption.

I checked adapter and router settings for differences, and find none. IP and DNS are assigned via DHCP by the router. DHCP is set to Cloudflare in the router. IPV6 is disabled on the wireless NICs.

Router is a TP-Link Archer C2300. There is nothing in the router log to indicate what is occurring.

I can enable fiddler and attach a log if you wish.

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It should be obvious to anyone , that this benchmark produces fake results for Firefox.

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Paranoid? No, it seems obvious that there is a problem with Firefox since after changing the agent it still produces a much slower result than other browsers. Why does Firefox cause my wireless to need to be reset? Is this some kind of plot by TP-Link too? Also, why did it just start occurring recently after some major changes were made to Firefox?

I did not come here seeking conspiracy theories. I came looking for competent technical support.

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These seem far more likely reasons than "fake results" from a well-known and respected site:

https://support.mozilla.org/en-US/kb/firefox-cant-load-websites-other-browsers-can#w_ipv6

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Yes, I call it fake results, because speedtest.net appears to use user-agent sniffing to apply different methods of performing speedtests when using different browsers. This causes Firefox to use websockets (much slower method) while Chromium uses XHR, what makes comparing browsers impossible.

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It sounds more like a problem with how Firefox uses websockets. It worked fine until a month or so ago. What changes were made under the hood on Firefox that caused this?

Firefox used to be my go-to browser, but several years ago it went to hell and became extremely slow and unreliable, forcing me to find a different browser. I have been holding out hope that it will improve, but when something like this occurs, I become less hopeful. I still use it on a limited basis and have not fully abandoned it because it was once so good.

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Just to rule out your "fake results" claim, I changed the user agent on Vivaldi to be Firefox and ran the exact same test. NO ISSUES. Download AND upload speeds tested fine, and my wireless did not disconnect.

Once again, this points to a problem with Firefox itself.

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Crickets...

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