B 站在预装 Firefox 上 CPU 使用率高

影音多媒体
1

预装 Firefox 在播放 B 站视频时 CPU 占用约 6%，但是播放时 CPU 上升到~25%，nvtop 显示 GPU 占用 50%，足以在我散热不好的笔记本上积热。但是同样的笔记本在出厂预装的 win11+edge 上无如此严重的积热。其他发行版没有测试过。

经测试 YouTube 同理，但是不能排除 YouTube 故意恶心 FireFox。

有人遇到过相似的情况吗？

系统信息：

$ sudo inxi -CGMS --memory-short
System:
  Host: lupus Kernel: 6.14.4-1-default arch: x86_64 bits: 64
  Console: pty pts/0 Distro: openSUSE Tumbleweed 20250505
Machine:
  Type: Laptop System: ASUSTeK product: ASUS Zenbook S 14 UX5406SA_UX5406SA v: 1.0
    serial: T1N0KD00643503D
  Mobo: ASUSTeK model: UX5406SA v: 1.0 serial: DB351M100VA UEFI: American Megatrends LLC.
    v: UX5406SA.303 date: 11/08/2024
Memory:
  System RAM: total: 32 GiB available: 30.82 GiB used: 8.15 GiB (26.4%)
  Report: arrays: 1 capacity: 32 GiB installed: 32 GiB slots: 8 active: 8 type: LPDDR5 eec: None
CPU:
  Info: 8-core model: Intel Core Ultra 7 258V bits: 64 type: MCP cache: L2: 14 MiB
  Speed (MHz): avg: 400 min/max: 400/4700:4800:3700 cores: 1: 400 2: 400 3: 400 4: 400 5: 400
    6: 400 7: 400 8: 400
Graphics:
  Device-1: Intel Lunar Lake [Intel Arc Graphics 130V / 140V] driver: xe v: kernel
  Device-2: Shinetech ASUS FHD webcam driver: hid-sensor-hub,usbhid,uvcvideo type: USB
  Display: unspecified server: X.org v: 1.21.1.15 with: Xwayland v: 24.1.6 driver: X:
    loaded: modesetting unloaded: vesa dri: iris gpu: xe tty: 201x55 resolution: 2880x1800
  API: EGL v: 1.5 drivers: iris,swrast platforms: gbm,surfaceless,device
  API: OpenGL v: 4.6 compat-v: 4.5 vendor: mesa v: 25.0.5 note: console (EGL sourced)
    renderer: Mesa Intel Graphics (LNL), llvmpipe (LLVM 20.1.3 256 bits)
  API: Vulkan v: 1.4.309 drivers: N/A surfaces: N/A
  Info: Tools: api: clinfo, eglinfo, glxinfo, vulkaninfo de: kscreen-console,kscreen-doctor
    gpu: gputop, intel_gpu_top, lsgpu wl: wayland-info x11: xdpyinfo, xprop, xrandr

Firefox about:support / Codec Support Information

Codec Name	Software Decoding	Hardware Decoding
H264		Supported			Supported
VP9			Supported			Supported
VP8			Supported			Supported
AV1			Supported			Supported
HEVC		Supported			Supported
AAC			Supported			Unsupported
MP3			Supported			Unsupported
Opus		Supported			Unsupported
Vorbis		Supported			Unsupported
FLAC		Supported			Unsupported
Wave		Supported			Unsupported
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