Firefox : solutions to reduce CPU usage when viewing YouTube videos & using many tabs

[deepspace9 (stephane l)]

I’m a long-time Firefox user but I find Firefox cpu usage very high (compared to Brave) especially when viewing Youtube videos or handling many tabs (more than 100).

I wonder what Firefox & global tweaks others are using to lower CPU usage on Fedore/SilverBlue.
Seems Firefox tab management & Youtube handing (or rather Google causing issues for non Chrome browsers) are problematic.

My hardware is pretty decent : AMD Ryzen™ 5 PRO 5650GE with Radeon™ Graphics × 12
and use hardware acceleration but I see some high load on regular basis :

I’m using Firefox Flathub Flatpak .
My SilverBlue set-up is the following :

   RemovedBasePackages: mesa-va-drivers 25.0.7-2.fc42 noopenh264 2.5.0-2.fc42
          LayeredPackages: android-tools asunder autofs distrobox file-roller-nautilus gstreamer1-plugin-openh264 gstreamer1-plugins-ugly libvirt mesa-va-drivers-freeworld mesa-vdpau-drivers-freeworld
                           mozilla-openh264 nnn openssl rpmfusion-free-release rpmfusion-nonfree-release

I tend to use many tabs (more than 100) and multiple extensions :

• Name Type Enabled
• Add-ons Search Detection extension true
• Auto Tab Discard extension true
• Bonjourr · Minimalist Startpage extension true
• Chrome Mask extension true
• ClearURLs extension true
• Decentraleyes extension true
• Export Tabs URLs extension true
• Facebook Container extension true
• Form Autofill extension true
• GNOME Shell integration extension true
• Go To Playing Tab extension true
• New Tab extension true
• Picture-In-Picture extension true
• Privacy Badger extension true
• Proton Pass: Free Password Manager extension true
• Save Screenshot extension true
• SingleFile extension true
• uBlock Origin extension true
• User-Agent Switcher and Manager extension true
• Web Compatibility Interventions extension true
• Language: Français (French) locale true
• System theme — auto theme true
• Dark theme false
• Firefox Alpenglow theme false
• Light theme false

Seems setting gfx.webrender.software to True as helped a bit.
I tried to fake my User-Agent on Youtube but it did not improve the situation.

I hear about BetterFox, can this be a solution ? What about Floorp too ?

[anothermindbomb (Steve Flynn)]

Personally, I stopped watching YouTube in the browser and switched to FreeTube. I was unable to get my browser (Zen) to use my GPU for video decoding, and the fan noise was annoying. Slow responsiveness in the browser, dropped frames, annoying lag when scrubbing the timeline much as you’re finding.

Switching to Freetube solved all of my issues, at the expense of having to change my muscle memory from watching everything in the browser itself.

As an aside, what do you have in the Graphics section of about:support

[deepspace9 (stephane l)]

Thanks for your reply / help. I’ll give Freetube a try.

Here it is :
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Graphics

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Features

Window Device Pixel Ratios: 1,1

Compositing: WebRender (Software)

Font Visibility Debug Info: Linux Unknown - ID=org.fr

Asynchronous Pan/Zoom: wheel input enabled; scrollbar drag enabled; keyboard enabled; autoscroll enabled; smooth pinch-zoom enabled

WebGL 1 Driver WSI Info: outOfProcess: false inProcess: true EGL_VENDOR: Mesa Project EGL_VERSION: 1.5 EGL_EXTENSIONS: EGL_ANDROID_blob_cache EGL_ANDROID_native_fence_sync EGL_EXT_buffer_age EGL_EXT_config_select_group EGL_EXT_create_context_robustness EGL_EXT_image_dma_buf_import EGL_EXT_image_dma_buf_import_modifiers EGL_EXT_present_opaque EGL_EXT_protected_surface EGL_EXT_query_reset_notification_strategy EGL_EXT_surface_compression EGL_EXT_swap_buffers_with_damage EGL_IMG_context_priority EGL_KHR_cl_event2 EGL_KHR_config_attribs EGL_KHR_context_flush_control EGL_KHR_create_context EGL_KHR_create_context_no_error EGL_KHR_fence_sync EGL_KHR_get_all_proc_addresses EGL_KHR_gl_colorspace EGL_KHR_gl_renderbuffer_image EGL_KHR_gl_texture_2D_image EGL_KHR_gl_texture_3D_image EGL_KHR_gl_texture_cubemap_image EGL_KHR_image_base EGL_KHR_no_config_context EGL_KHR_reusable_sync EGL_KHR_surfaceless_context EGL_KHR_swap_buffers_with_damage EGL_EXT_pixel_format_float EGL_KHR_wait_sync EGL_MESA_configless_context EGL_MESA_drm_image EGL_MESA_gl_interop EGL_MESA_image_dma_buf_export EGL_MESA_query_driver EGL_MESA_x11_native_visual_id EGL_WL_bind_wayland_display EGL_WL_create_wayland_buffer_from_image EGL_EXTENSIONS(nullptr): EGL_EXT_device_base EGL_EXT_device_enumeration EGL_EXT_device_query EGL_EXT_platform_base EGL_KHR_client_get_all_proc_addresses EGL_EXT_client_extensions EGL_KHR_debug EGL_EXT_platform_device EGL_EXT_explicit_device EGL_EXT_platform_wayland EGL_KHR_platform_wayland EGL_EXT_platform_x11 EGL_KHR_platform_x11 EGL_EXT_platform_xcb EGL_MESA_platform_gbm EGL_KHR_platform_gbm EGL_MESA_platform_surfaceless

WebGL 1 Driver Renderer: AMD – AMD Radeon Graphics (radeonsi, renoir, ACO, DRM 3.63, 6.15.4-200.fc42.x86_64)

WebGL 1 Driver Version: 4.6 (Compatibility Profile) Mesa 25.1.3 (git-ba95e694fe)

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GL_AMD_framebuffer_multisample_advanced GL_EXT_EGL_image_storage GL_EXT_texture_shadow_lod GL_INTEL_blackhole_render GL_MESA_framebuffer_flip_y GL_NV_compute_shader_derivatives GL_EXT_EGL_sync GL_EXT_demote_to_helper_invocation GL_KHR_shader_subgroup GL_EXT_EGL_image_storage_compression GL_NV_ES1_1_compatibility GL_MESA_texture_const_bandwidth

WebGL 1 Extensions: ANGLE_instanced_arrays EXT_blend_minmax EXT_color_buffer_half_float EXT_depth_clamp EXT_float_blend EXT_frag_depth EXT_shader_texture_lod EXT_sRGB EXT_texture_compression_bptc EXT_texture_compression_rgtc EXT_texture_filter_anisotropic MOZ_debug OES_element_index_uint OES_fbo_render_mipmap 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_astc WEBGL_compressed_texture_etc 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: outOfProcess: false inProcess: true EGL_VENDOR: Mesa Project EGL_VERSION: 1.5 EGL_EXTENSIONS: EGL_ANDROID_blob_cache EGL_ANDROID_native_fence_sync EGL_EXT_buffer_age EGL_EXT_config_select_group EGL_EXT_create_context_robustness EGL_EXT_image_dma_buf_import EGL_EXT_image_dma_buf_import_modifiers EGL_EXT_present_opaque EGL_EXT_protected_surface EGL_EXT_query_reset_notification_strategy EGL_EXT_surface_compression EGL_EXT_swap_buffers_with_damage EGL_IMG_context_priority EGL_KHR_cl_event2 EGL_KHR_config_attribs EGL_KHR_context_flush_control EGL_KHR_create_context EGL_KHR_create_context_no_error EGL_KHR_fence_sync EGL_KHR_get_all_proc_addresses EGL_KHR_gl_colorspace EGL_KHR_gl_renderbuffer_image EGL_KHR_gl_texture_2D_image EGL_KHR_gl_texture_3D_image EGL_KHR_gl_texture_cubemap_image EGL_KHR_image_base EGL_KHR_no_config_context EGL_KHR_reusable_sync EGL_KHR_surfaceless_context EGL_KHR_swap_buffers_with_damage EGL_EXT_pixel_format_float EGL_KHR_wait_sync EGL_MESA_configless_context EGL_MESA_drm_image EGL_MESA_gl_interop EGL_MESA_image_dma_buf_export EGL_MESA_query_driver EGL_MESA_x11_native_visual_id EGL_WL_bind_wayland_display EGL_WL_create_wayland_buffer_from_image EGL_EXTENSIONS(nullptr): EGL_EXT_device_base EGL_EXT_device_enumeration EGL_EXT_device_query EGL_EXT_platform_base EGL_KHR_client_get_all_proc_addresses EGL_EXT_client_extensions EGL_KHR_debug EGL_EXT_platform_device EGL_EXT_explicit_device EGL_EXT_platform_wayland EGL_KHR_platform_wayland EGL_EXT_platform_x11 EGL_KHR_platform_x11 EGL_EXT_platform_xcb EGL_MESA_platform_gbm EGL_KHR_platform_gbm EGL_MESA_platform_surfaceless

WebGL 2 Driver Renderer: AMD – AMD Radeon Graphics (radeonsi, renoir, ACO, DRM 3.63, 6.15.4-200.fc42.x86_64)

WebGL 2 Driver Version: 4.6 (Core Profile) Mesa 25.1.3 (git-ba95e694fe)

WebGL 2 Driver Extensions: GL_AMD_conservative_depth GL_AMD_depth_clamp_separate GL_AMD_draw_buffers_blend GL_AMD_framebuffer_multisample_advanced GL_AMD_gpu_shader_int64 GL_AMD_multi_draw_indirect GL_AMD_performance_monitor GL_AMD_pinned_memory GL_AMD_query_buffer_object GL_AMD_seamless_cubemap_per_texture GL_AMD_shader_stencil_export GL_AMD_shader_trinary_minmax GL_AMD_texture_texture4 GL_AMD_vertex_shader_layer GL_AMD_vertex_shader_viewport_index GL_ANGLE_texture_compression_dxt3 GL_ANGLE_texture_compression_dxt5 GL_ARB_ES2_compatibility GL_ARB_ES3_1_compatibility GL_ARB_ES3_2_compatibility GL_ARB_ES3_compatibility GL_ARB_arrays_of_arrays GL_ARB_base_instance GL_ARB_bindless_texture GL_ARB_blend_func_extended GL_ARB_buffer_storage GL_ARB_clear_buffer_object GL_ARB_clear_texture GL_ARB_clip_control GL_ARB_color_buffer_float GL_ARB_compressed_texture_pixel_storage GL_ARB_compute_shader GL_ARB_compute_variable_group_size GL_ARB_conditional_render_inverted GL_ARB_conservative_depth 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GL_ARB_transform_feedback_overflow_query GL_ARB_uniform_buffer_object GL_ARB_vertex_array_bgra GL_ARB_vertex_array_object GL_ARB_vertex_attrib_64bit GL_ARB_vertex_attrib_binding GL_ARB_vertex_buffer_object GL_ARB_vertex_shader GL_ARB_vertex_type_10f_11f_11f_rev GL_ARB_vertex_type_2_10_10_10_rev GL_ARB_viewport_array GL_ATI_blend_equation_separate GL_ATI_meminfo GL_ATI_texture_float GL_ATI_texture_mirror_once GL_EXT_EGL_image_storage GL_EXT_EGL_image_storage_compression GL_EXT_EGL_sync GL_EXT_abgr GL_EXT_blend_equation_separate GL_EXT_debug_label GL_EXT_demote_to_helper_invocation GL_EXT_depth_bounds_test GL_EXT_draw_buffers2 GL_EXT_draw_instanced GL_EXT_framebuffer_blit GL_EXT_framebuffer_multisample GL_EXT_framebuffer_multisample_blit_scaled GL_EXT_framebuffer_object GL_EXT_framebuffer_sRGB GL_EXT_memory_object GL_EXT_memory_object_fd GL_EXT_packed_depth_stencil GL_EXT_packed_float GL_EXT_pixel_buffer_object GL_EXT_polygon_offset_clamp GL_EXT_provoking_vertex GL_EXT_semaphore GL_EXT_semaphore_fd GL_EXT_shader_image_load_formatted GL_EXT_shader_image_load_store GL_EXT_shader_integer_mix GL_EXT_shader_samples_identical GL_EXT_texture_array GL_EXT_texture_compression_dxt1 GL_EXT_texture_compression_rgtc GL_EXT_texture_compression_s3tc GL_EXT_texture_filter_anisotropic GL_EXT_texture_filter_minmax GL_EXT_texture_integer GL_EXT_texture_mirror_clamp GL_EXT_texture_sRGB GL_EXT_texture_sRGB_R8 GL_EXT_texture_sRGB_decode GL_EXT_texture_shadow_lod GL_EXT_texture_shared_exponent GL_EXT_texture_snorm GL_EXT_texture_storage GL_EXT_texture_swizzle GL_EXT_timer_query GL_EXT_transform_feedback GL_EXT_vertex_array_bgra GL_EXT_vertex_attrib_64bit GL_EXT_window_rectangles GL_IBM_multimode_draw_arrays GL_INTEL_blackhole_render GL_KHR_blend_equation_advanced GL_KHR_context_flush_control GL_KHR_debug GL_KHR_no_error GL_KHR_parallel_shader_compile GL_KHR_robust_buffer_access_behavior GL_KHR_robustness GL_KHR_shader_subgroup GL_KHR_texture_compression_astc_ldr GL_KHR_texture_compression_astc_sliced_3d GL_MESA_framebuffer_flip_y GL_MESA_pack_invert GL_MESA_shader_integer_functions GL_MESA_texture_const_bandwidth GL_MESA_texture_signed_rgba GL_NVX_gpu_memory_info GL_NV_alpha_to_coverage_dither_control GL_NV_compute_shader_derivatives GL_NV_conditional_render GL_NV_copy_image GL_NV_depth_clamp GL_NV_packed_depth_stencil GL_NV_shader_atomic_int64 GL_NV_texture_barrier GL_NV_vdpau_interop GL_OES_EGL_image GL_S3_s3tc

WebGL 2 Extensions: EXT_color_buffer_float EXT_depth_clamp EXT_float_blend EXT_texture_compression_bptc EXT_texture_compression_rgtc EXT_texture_filter_anisotropic MOZ_debug OES_draw_buffers_indexed OES_texture_float_linear WEBGL_compressed_texture_astc WEBGL_compressed_texture_etc WEBGL_compressed_texture_s3tc WEBGL_compressed_texture_s3tc_srgb WEBGL_debug_renderer_info WEBGL_debug_shaders WEBGL_lose_context

Window Protocol: wayland

Desktop Environment: gnome

Target Frame Rate: 60

WebGPU Default Adapter: { “navigator.gpu”: null }

WebGPU Fallback Adapter: { “navigator.gpu”: null }

GPU #1

Active: Yes

Description: AMD Radeon Graphics (radeonsi, renoir, ACO, DRM 3.63, 6.15.4-200.fc42.x86_64)

Vendor ID: 0x1002

Device ID: 0x1638

Driver Vendor: mesa/radeonsi

Driver Version: 25.1.3.0

RAM: 0

Diagnostics

AzureCanvasBackend: skia

AzureContentBackend: skia

AzureFallbackCanvasBackend: skia

CMSOutputProfile: Empty profile data

Display0: 1920x1080@60Hz scales:1.000000|1.000000

Display1: 1920x1080@60Hz scales:1.000000|1.000000

DisplayCount: 2

Font Visibility Debug Info: Linux Unknown - ID=org.fr

Decision Log

HW_COMPOSITING:

default: available,

env: blocked, Acceleration blocked by platform,

OPENGL_COMPOSITING:

default: unavailable, Hardware compositing is disabled, Blocklisted; failure code FEATURE_FAILURE_OPENGL_NEED_HWCOMP

WEBRENDER:

default: available,

user: disabled, User force-enabled software WR, Blocklisted; failure code FEATURE_FAILURE_USER_FORCE_ENABLED_SW_WR

WEBRENDER_COMPOSITOR:

default: disabled, Disabled by default, Blocklisted; failure code FEATURE_FAILURE_DISABLED

env: blocklisted, Blocklisted by gfxInfo, Blocklisted; failure code FEATURE_FAILURE_WEBRENDER_COMPOSITOR_DISABLED

WEBRENDER_PARTIAL:

default: available,

WEBRENDER_SHADER_CACHE:

default: disabled, Disabled by default, Blocklisted; failure code FEATURE_FAILURE_DISABLED

runtime: unavailable, WebRender disabled, Blocklisted; failure code FEATURE_FAILURE_WR_DISABLED

WEBRENDER_OPTIMIZED_SHADERS:

default: available,

runtime: unavailable, WebRender disabled, Blocklisted; failure code FEATURE_FAILURE_WR_DISABLED

WEBRENDER_ANGLE:

default: available,

env: unavailable, OS not supported, Blocklisted; failure code FEATURE_FAILURE_OS_NOT_SUPPORTED

WEBRENDER_DCOMP_PRESENT:

default: available,

user: disabled, User disabled via pref, Blocklisted; failure code FEATURE_FAILURE_DCOMP_PREF_DISABLED

env: unavailable, Requires GPU process, Blocklisted; failure code FEATURE_FAILURE_NO_GPU_PROCESS

runtime: unavailable, Requires ANGLE, Blocklisted; failure code FEATURE_FAILURE_DCOMP_NOT_ANGLE

WEBRENDER_SCISSORED_CACHE_CLEARS:

default: available,

WEBGPU:

default: available,

runtime: blocked, WebGPU cannot be enabled unless in Nightly, or Early Beta on Wi, Blocklisted; failure code WEBGPU_DISABLE_RELEASE_OR_NON_WINDOWS_EARLY_BETA

X11_EGL:

default: available,

DMABUF:

default: available,

HARDWARE_VIDEO_DECODING:

default: available,

HW_DECODED_VIDEO_ZERO_COPY:

default: available,

VP8_HW_DECODE:

default: available,

env: blocklisted, #BLOCKLIST_FEATURE_FAILURE_VIDEO_DECODING_MISSING, Blocklisted; failure code FEATURE_FAILURE_VIDEO_DECODING_MISSING

VP9_HW_DECODE:

default: available,

DMABUF_SURFACE_EXPORT:

default: available,

env: blocked, Blocklisted by gfxInfo, Blocklisted; failure code FEATURE_FAILURE_BROKEN_DRIVER

BACKDROP_FILTER:

default: available,

CANVAS_RENDERER_THREAD:

default: available,

ACCELERATED_CANVAS2D:

default: available,

env: blocked, Disabled by Software WebRender, Blocklisted; failure code FEATURE_FAILURE_DISABLED_BY_SOFTWARE_WEBRENDER

H264_HW_DECODE:

default: available,

AV1_HW_DECODE:

default: available,

env: blocklisted, #BLOCKLIST_FEATURE_FAILURE_VIDEO_DECODING_MISSING, Blocklisted; failure code FEATURE_FAILURE_VIDEO_DECODING_MISSING

HEVC_HW_DECODE:

default: available,

REMOTE_CANVAS:

default: disabled, Disabled via pref, Blocklisted; failure code FEATURE_FAILURE_DISABLED

env: unavailable-no-gpu-process, Disabled without GPU process, Blocklisted; failure code FEATURE_REMOTE_CANVAS_NO_GPU_PROCESS

runtime: blocked, Platform not supported, Blocklisted; failure code FEATURE_REMOTE_CANVAS_NOT_WINDOWS

DMABUF_WEBGL:

default: available,

Failure Log

(#0) Error: RenderCompositorSWGL failed mapping default framebuffer, no dt

Media

---

Audio Backend: pulse-rust

Max Channels: 2

Preferred Sample Rate: 48000

Roundtrip latency (standard deviation): 241.58ms (35.40)

Codec Support Information:

Codec Name: Software Decoding, Hardware Decoding

H264: Supported, Supported

VP9: Supported, Supported

VP8: Supported, Unsupported

AV1: Supported, Unsupported

HEVC: Supported, Supported

AAC: Supported, Unsupported

MP3: Supported, Unsupported

Opus: Supported, Unsupported

Vorbis: Supported, Unsupported

FLAC: Supported, Unsupported

Wave: Supported, Unsupported

Output Devices

Name: Group, Vendor, State, Preferred, Format, Channels, Rate, Latency

Family 17h/19h/1ah HD Audio Controller Stéréo analogique: /devices/pci0000:00/0000:00:08.1/0000:03:00.6/sound/card2, Advanced Micro Devices, Inc. [AMD], Enabled, All, default: F32LE, support: S16LE S16BE F32LE F32BE, 2, default: 48000, support: 1 - 384000, 0 - 0

Input Devices

Name: Group, Vendor, State, Preferred, Format, Channels, Rate, Latency

Webcam C270 Mono: /devices/pci0000:00/0000:00:08.1/0000:03:00.4/usb3/3-1/3-1.1/3-1.1:1.2/sound/card0, Logitech, Inc., Enabled, All, default: S16LE, support: S16LE S16BE F32LE F32BE, 1, default: 48000, support: 1 - 384000, 0 - 0

Monitor of Family 17h/19h/1ah HD Audio Controller Stéréo analogique: /devices/pci0000:00/0000:00:08.1/0000:03:00.6/sound/card2, Advanced Micro Devices, Inc. [AMD], Enabled, None, default: F32LE, support: S16LE S16BE F32LE F32BE, 2, default: 48000, support: 1 - 384000, 0 - 0

Family 17h/19h/1ah HD Audio Controller Stéréo analogique: /devices/pci0000:00/0000:00:08.1/0000:03:00.6/sound/card2, Advanced Micro Devices, Inc. [AMD], Unplugged, None, default: F32LE, support: S16LE S16BE F32LE F32BE, 2, default: 48000, support: 1 - 384000, 0 - 0

Enumerate database

Content Decryption Modules Information

Key System Name: Video Robustness, Audio Robustness, Capabilities, Clear Lead, HDCP 2.2 Compatible

org.w3.clearkey: {“persistent”:“Optional”,“distinctive”:“NotAllowed”,“sessionType”:“[Temporary]”,“codec”:{“decodingAndDecrypting”:,“decryptingOnly”:[“h264(all)”,“aac(all)”,“flac(all)”,“opus(all)”,“vp9(all)”,“av1(all)”,“vorbis(all)”,“vp8(all)”]}}, No, No
`

[anothermindbomb (Steve Flynn)]

Same thing as I found - most video features disabled, so your CPU is doing the decoding, transcribing, resizing, scaling, etc. Same browser on Windows has everything enabled, most annoyingly.

Let me know how you get on with an external player like FreeTube (there are others, it was just the first one I tried, and I was content with it). Experiment and if you find a better solution, please let me know as I feel your pain and I don’t enjoy it!

To try to answer your original question - it seems to be a Wayland/browser/video driver issue - the combination is just not mature enough yet to get GFX card hardware video decoding working fully within the browser itself. Change the graphics card to AMD, or the browser to maybe chrome, or switch to Xorg and you may well find everything is lovely.

I took the easy way out and used a stand alone YT viewer, and I have far better results. It’s not a solution to your problem, but hopefully it makes it bearable until the software aligns.

[deepspace9 (stephane l)]

FreeTube is nice. This software is maintained / updated on regular basis.
UI is ok, and I just need to add all my favorite channels in proper profils.
I’m using an AMD card. It seems I missed media.rdd-process.enabled:true in Firefox but it does not improve things so much.
Still no VP1 & other stuff

I gave Floorp a try but about:support is really different than Firefox. Weird.
Brave hardware acceleration seems ok

I don’t see any issue in my software installation (no package missing / Freeworld packages installed). I don’t see how to have complete hardware acceleration in Firefox.
Better now use FreeTube from now to get rid of these CPU spikes with my AMD Ryzen 5 PRO.

[litemotiv (Olivier)]

I have AV1 support on my Ryzen GPU:

Maybe you also need to replace ffmpeg from rpmfusion?

$ sudo dnf swap ffmpeg-free ffmpeg --allowerasing

In Youtube on Firefox, it may also help to disable ‘ambient mode’, having it on (which is the default) seemed to cause performance issues for me:

[deepspace9 (stephane l)]

Thanks @litemotiv .
I was indeed using ffmpeg-free. Strangeing. I switched to ffmpeg - through :

sudo rpm-ostree override remove libavcodec-free libavfilter-free libavformat-free libavutil-free libpostproc-free libswresample-free libswscale-free ffmpeg-free libavdevice-free --install ffmpeg

as I’m running Silverblue.

Still no hardware decoding for AV1. Weird.
I will try to disable Ambient mode (Eclairage de cinéma in French) and see my CPU issues are gone.

[litemotiv (Olivier)]

@deepspace9

Still no hardware decoding for AV1. Weird.

Hmm the GPU in your Ryzen 5 PRO 5650GE appears to be a Radeon Vega 7, according to thread below that may not have hardware AV1 support:

AMD AV1 Hardware encoding not working

[deepspace9 (stephane l)]

Right. I crosschecked on https://www.cpu-monkey.com/en/cpu-amd_ryzen_5_pro_5650ge
So no AV1 hardware decoding is normal. Thanks for investigating this Olivier.

[pg-tips (P G)]

You can set a preference so that Firefox will avoid AV1 and hopefully request videos in a hardware-decodable codec instead. In about:config, set media.av1.enabled to false.

[deepspace9 (stephane l)]

Disabling AV1 in Firefox should lower the CPU : Reddit - The heart of the internet
Firefox does not automatically disable AV1 if the GPU does not support it / does not offer Hardware decoding for AV1 : 1716164 - disable av1 by default in all hardware that does not support av1 hardware decoding

[tqcharm (Mike B.)]

@deepspace9

I’m using Firefox Flathub Flatpak .

@deepspace9

I was indeed using ffmpeg-free. Strangeing. I switched to ffmpeg - through :

sudo rpm-ostree override remove libavcodec-free libavfilter-free libavformat-free libavutil-free libpostproc-free libswresample-free libswscale-free ffmpeg-free libavdevice-free --install ffmpeg

as I’m running Silverblue

I don’t think override-removing packages from the base image is of any help here, given that you’re using Firefox as Flatpak from Flathub, which is referencing the org.freedesktop.Platform.ffmpeg-full runtime extension, which in turn should be installed on your system, I assume.

[deepspace9 (stephane l)]

Thanks @tqcharm . Well spotted! Flatpak org.freedesktop.Platform.ffmpeg-full is indeed installed. So using ffmpeg or ffmepg-free has no impact on Firefox.

[deepspace9 (stephane l)]

Thanks @pg-tips. It is what I found on Internet a few minutes before your post.
Seems now my Firefox configuration is optimal with this setting

[lendenu (Lorenzo)]

Anyway the short answer would be nope.
Besides Brave is the same as Chromium and any other Chromium-based browser, Youtube is very heavy as a Web site and videos are heavier as you increase the size and resolution, because there is more calculation to do.
If it can make you feel better, I stream Youtube videos on a Celeron with 2 cores and 4 Giga of RAM, no hardware decoding on VP9 and AV1. It is doable up to about 480p. Of course as soon I do something else…

[soconfused (K k)]

This is obscene. Thank you. Youtube is offloading their bandwidth settings in favor of our collective (significantly) higher CPU usage. This should be off by default. It’s really percepitble on older CPUs. I’m surprised Firefox custom prefs like Arkenfox didn’t have this off. Maybe Firefox maintainers should have this changed to off too. There’s literally negative benefit to all of Fedora users of this being on because virtually no end user today really cares about bandwidth savings. And those who do care are probably pretty screwed for CPU savings.

[deepspace9 (stephane l)]

It’s a pity that nowadays, you can have plenty of tabs & watch videos with browsers on Android without performance problems and it’s not the case when using Linux / Fedora or other distributions & Firefox.
I’ve replaced Auto Discard Tab extension by Tabbro (https://addons.mozilla.org/en-US/firefox/addon/tabbro/) and face less CPU spikes. Auto Discard Tab was slowing my Firefox. Worth knowing.
I also now use FreeTube more & more - thanks @anothermindbomb

[soconfused (K k)]

With this firefox’s config media.av1.enabled thing off, I can actually watch 1080x60 youtube videos on this laptop where as I cannot if it’s on (it stutters a lot if it’s on)!

[lendenu (Lorenzo)]

The problem is the Internet was meant to connect simple devices 1:1 to exchange text files and nowadays it is stretched to totaly different uses, like a distributed and de-localized television. Youtube wants to broadcast high definition videos and regardless the compression used, it means lots of bandwith and CPU-GPU to decode the stream.

Firefox does not decide what content the Web Sites provide and how, the only thing they can do is to stay relevant in a world where there are only two browsers left

[deepspace9 (stephane l)]

@deepspace9

Free

@anothermindbomb FreeTube is great but it’s broken lately : [Bug]: [BAD_HTTP_STATUS: 403] Potential causes: IP block or streaming URL deciphering failed · Issue #8083 · FreeTubeApp/FreeTube · GitHub