why does fierfox eats so much cpu when i'm on youtube?
i have Pentium d 925 3ghz dual core, GeForce 210, Windows 10 Pro, and a good internet connection. Recently i started to lag really hard on youtube videos, playing at 720. I always watched videos in 720pp, on windows xp, vista, 7 ultimate, and even after the upgrade, i didn't had any lag. Now i lag like hell, after the first 3 seconds the cpu goes insane, firefox is consuming 95% of cpu power. I had to downgrade to firefox 39 and install html5 disablers just to watch a video... here is some info about my firefox: Application Basics
Name: Firefox Version: 39.0 Build ID: 20150630154324 Update Channel: release User Agent: Mozilla/5.0 (Windows NT 10.0; rv:39.0) Gecko/20100101 Firefox/39.0 Multiprocess Windows: 0/1 (default: false)
Crash Reports for the Last 3 Days
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Extensions
Name: Adblock Plus Version: 2.7.3 Enabled: true ID: {d10d0bf8-f5b5-c8b4-a8b2-2b9879e08c5d}
Name: YouTube High Definition Version: 45.1 Enabled: true ID: {7b1bf0b6-a1b9-42b0-b75d-252036438bdc}
Name: YouTube™ Flash® Player Version: 1.6.2 Enabled: true ID: jid1-HAV2inXAnQPIeA@jetpack
Graphics
Adapter Description: NVIDIA GeForce 210 Adapter Drivers: nvd3dum nvwgf2um,nvwgf2um Adapter RAM: 1024 Asynchronous Pan/Zoom: none Device ID: 0x0a65 Direct2D Enabled: true DirectWrite Enabled: true (10.0.10586.0) Driver Date: 1-29-2016 Driver Version: 9.18.13.4195 GPU #2 Active: false GPU Accelerated Windows: 1/1 Direct3D 11 (OMTC) Subsys ID: 140110b0 Vendor ID: 0x10de windowLayerManagerRemote: true AzureCanvasBackend: direct2d 1.1 AzureContentBackend: direct2d 1.1 AzureFallbackCanvasBackend: cairo AzureSkiaAccelerated: 0
Important Modified Preferences
accessibility.typeaheadfind.flashBar: 0 browser.cache.disk.capacity: 358400 browser.cache.disk.filesystem_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.download.importedFromSqlite: true browser.places.smartBookmarksVersion: 7 browser.sessionstore.upgradeBackup.latestBuildID: 20150630154324 browser.startup.homepage_override.buildID: 20150630154324 browser.startup.homepage_override.mstone: 39.0 browser.urlbar.suggest.searches: true browser.urlbar.userMadeSearchSuggestionsChoice: true dom.apps.reset-permissions: true dom.mozApps.used: true extensions.lastAppVersion: 39.0 font.internaluseonly.changed: false gfx.crash-guard.d3d11layers.appVersion: 46.0 gfx.crash-guard.d3d11layers.deviceID: 0x0a65 gfx.crash-guard.d3d11layers.driverVersion: 9.18.13.4195 gfx.crash-guard.d3d11layers.feature-d2d: true gfx.crash-guard.d3d11layers.feature-d3d11: true gfx.crash-guard.status.d3d11layers: 2 gfx.crash-guard.status.d3d9video: 2 gfx.direct3d.last_used_feature_level_idx: 0 media.encoder.webm.enabled: false media.gmp-eme-adobe.abi: x86-msvc-x86 media.gmp-eme-adobe.lastUpdate: 1461965695 media.gmp-eme-adobe.version: 17 media.gmp-gmpopenh264.abi: x86-msvc-x86 media.gmp-gmpopenh264.enabled: true media.gmp-gmpopenh264.lastUpdate: 1461954340 media.gmp-gmpopenh264.version: 1.5.3 media.gmp-manager.buildID: 20150630154324 media.gmp-manager.lastCheck: 1461967495 media.hardware-video-decoding.failed: false media.webrtc.debug.aec_log_dir: C:\Users\Andrei\AppData\Local\Temp/ media.webrtc.debug.log_file: C:\Users\Andrei\AppData\Local\Temp/WebRTC.log network.cookie.prefsMigrated: true network.predictor.cleaned-up: true places.database.lastMaintenance: 1461969041 places.history.expiration.transient_current_max_pages: 80516 plugin.disable_full_page_plugin_for_types: application/pdf plugin.importedState: true privacy.sanitize.migrateClearSavedPwdsOnExit: true privacy.sanitize.migrateFx3Prefs: true storage.vacuum.last.index: 0 storage.vacuum.last.places.sqlite: 1461969040 webgl.disabled: true
Important Locked Preferences
JavaScript
Incremental GC: true
Accessibility
Activated: false Prevent Accessibility: 0
Library Versions
NSPR Expected minimum version: 4.10.8 Version in use: 4.10.8
NSS Expected minimum version: 3.19.2 Basic ECC Version in use: 3.19.2 Basic ECC
NSSSMIME Expected minimum version: 3.19.2 Basic ECC Version in use: 3.19.2 Basic ECC
NSSSSL Expected minimum version: 3.19.2 Basic ECC Version in use: 3.19.2 Basic ECC
NSSUTIL Expected minimum version: 3.19.2 Version in use: 3.19.2
Experimental Features
Please, please help me i'm going insane with this problem..i've reseted the windows twice, i don't have viruses i don't have hardware problems i just started to lag for some reason...
Thank you.
الحل المُختار
Ok, so, i upgraded to the last version again. And it seems it works fine for now.
Read this answer in context 👍 0All Replies (5)
BTW, i have hardware acceleration activated.
Start Firefox in Safe Mode {web Link} by holding down the <Shift>
(Mac=Options) key, and then starting Firefox. Is the problem still there?
https://support.mozilla.org/en-US/kb/websites-look-wrong-or-appear-differently
https://support.mozilla.org/en-US/kb/firefox-slow-how-make-it-faster
https://support.mozilla.org/en-US/kb/firefox-uses-too-many-cpu-resources-how-fix
https://support.mozilla.org/en-US/kb/firefox-hangs-or-not-responding
https://support.mozilla.org/kb/Firefox+is+already+running+but+is+not+responding
The problem is still here, and this is a fresh install of firefox and windows, i don't think it will work
الحل المُختار
Ok, so, i upgraded to the last version again. And it seems it works fine for now.
Does toggling addons while watching youtube videos make a difference? For example, Adblocker?
Try Safe Mode to try it out: Diagnose Firefox issues using Troubleshoot Mode