browsing is slow, youtube doesn't work.
Hello, for a while now browsing with firefox as been an excruciating process. its very slow, and watching youtube would barely buffer videos at 144p (30 minutes of loading). Chrome works fine. I've tried - deleting cache and cookies switch to safemode reset the browser. none of these worked for me.
All Replies (8)
Hello,
To find the correct solution to your problem, we need some more non-personal information from you. Please do the following:
- Use ONE of these methods to open the Firefox Troubleshooting Information page:
- Click the menu button
, click on help 
and select Troubleshooting Information.
- Type about:support into the Firefox address bar and press the enter key.
- Click the menu button
- At the top of the Troubleshooting Information page that comes up, you should see a button that says "Copy text to clipboard". Click it.
- Now, go back to your forum post, right-click in the reply box and select Paste from the context menu (or else click inside the reply box and press the Ctrl+V keys) to paste all the information you copied into the forum post.
If you need further information about the Troubleshooting information page, please read the article Use the Troubleshooting Information page to help fix Firefox issues.
Thanks in advance for your help!
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/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
Application Basics
Name: Firefox Version: 40.0.3 Build ID: 20150826023504 Update Channel: release User Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:40.0) Gecko/20100101 Firefox/40.0 Multiprocess Windows: 0/1 (default: false)
Crash Reports for the Last 3 Days
All Crash Reports
Extensions
Name: Adblock Plus Version: 2.6.10 Enabled: true ID: {d10d0bf8-f5b5-c8b4-a8b2-2b9879e08c5d}
Name: RoboForm Toolbar for Firefox Version: 7.9.11.5 Enabled: true ID: {22119944-ED35-4ab1-910B-E619EA06A115}
Name: Speed Tweaks (SpeedyFox) Version: 0.1.1 Enabled: true ID: jid1-wZqm19rJzRkZUA@jetpack
Name: The Fox, Only Better Version: 1.2.3 Enabled: true ID: thefoxonlybetter@quicksaver
Name: Bitdefender Wallet Version: 2.0 Enabled: false ID: bdwteff@bitdefender.com
Graphics
Adapter Description: AMD Radeon HD 6900 Series Adapter Drivers: aticfx64 aticfx64 aticfx64 amdxc64 aticfx32 aticfx32 aticfx32 amdxc32 atiumd64 atidxx64 atidxx64 atiumdag atidxx32 atidxx32 atiumdva atiumd6a atitmm64 Adapter RAM: 2048 Asynchronous Pan/Zoom: none ClearType Parameters: Gamma: 2200 Pixel Structure: R ClearType Level: 100 Enhanced Contrast: 50 Device ID: 0x6719 Direct2D Enabled: true DirectWrite Enabled: true (10.0.10240.16430) Driver Date: 8-3-2015 Driver Version: 15.200.1062.1004 GPU #2 Active: false GPU Accelerated Windows: 1/1 Direct3D 11 (OMTC) Subsys ID: 23071787 Supports Hardware H264 Decoding: true Vendor ID: 0x1002 WebGL Renderer: Google Inc. -- ANGLE (AMD Radeon HD 6900 Series Direct3D11 vs_5_0 ps_5_0) windowLayerManagerRemote: true AzureCanvasBackend: direct2d 1.1 AzureContentBackend: direct2d 1.1 AzureFallbackCanvasBackend: cairo AzureSkiaAccelerated: 0
Important Modified Preferences
accessibility.typeaheadfind: true accessibility.typeaheadfind.flashBar: 0 browser.cache.disk.capacity: 153600 browser.cache.disk.filesystem_reported: 1 browser.cache.disk.smart_size.enabled: false browser.cache.disk.smart_size.first_run: false browser.cache.disk.smart_size.use_old_max: false browser.cache.frecency_experiment: 3 browser.cache.use_new_backend: 1 browser.download.importedFromSqlite: true browser.places.smartBookmarksVersion: 7 browser.search.useDBForOrder: true browser.sessionstore.upgradeBackup.latestBuildID: 20150826023504 browser.startup.homepage_override.buildID: 20150826023504 browser.startup.homepage_override.mstone: 40.0.3 dom.apps.reset-permissions: true dom.mozApps.used: true extensions.lastAppVersion: 40.0.3 font.language.group: he gfx.direct3d.last_used_feature_level_idx: 0 media.gmp-eme-adobe.lastUpdate: 1441353095 media.gmp-eme-adobe.version: 12 media.gmp-gmpopenh264.lastUpdate: 1441353097 media.gmp-gmpopenh264.version: 1.4 media.gmp-manager.buildID: 20150826023504 media.gmp-manager.lastCheck: 1441467713 network.auth.allow-subresource-auth: 2 network.cookie.prefsMigrated: true network.dns.disablePrefetch: true network.http.max-persistent-connections-per-proxy: 256 network.http.pipelining: true network.http.pipelining.aggressive: true network.http.pipelining.max-optimistic-requests: 3 network.http.pipelining.maxrequests: 12 network.http.pipelining.read-timeout: 60000 network.http.pipelining.reschedule-timeout: 15000 network.http.pipelining.ssl: true network.http.proxy.pipelining: true network.predictor.cleaned-up: true places.database.lastMaintenance: 1441361148 places.history.expiration.transient_current_max_pages: 91406 plugin.disable_full_page_plugin_for_types: application/pdf plugin.importedState: true plugin.state.npdeployjava: 0 privacy.donottrackheader.enabled: true privacy.sanitize.migrateFx3Prefs: true storage.vacuum.last.index: 1 storage.vacuum.last.places.sqlite: 1441361146
Important Locked Preferences
JavaScript
Incremental GC: true
Accessibility
Activated: true 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
FredMcD said
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/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
I have already tried that, as I've mentioned.
You can check for problems with preferences.
Delete possible user.js and numbered prefs-##.js files and rename (or delete) the prefs.js file to reset all prefs to the default value including prefs set via user.js and prefs that are no longer supported in the current Firefox release.
cor-el said
You can check for problems with preferences. Delete possible user.js and numbered prefs-##.js files and rename (or delete) the prefs.js file to reset all prefs to the default value including prefs set via user.js and prefs that are no longer supported in the current Firefox release.
I could not find said files.
You can use this button to go to the current Firefox profile folder:
- Help > Troubleshooting Information > Profile Directory: Show Folder (Linux: Open Directory; Mac: Show in Finder)
- http://kb.mozillazine.org/Profile_folder_-_Firefox
- C:\Users\<user>\AppData\Roaming\Mozilla\Firefox\Profiles\<profile>\
Windows hides some file extensions by default. Among them .html and .ini and .js and .txt and you may only see a file name without file extension. You can check the file extension (type) in the properties of the file in Windows Explorer via the right-click context menu.
Yeah, I mean I'm in the folder, with "show hidden files" ticked. I can see no such files.