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Vertical side scrolling is jerky

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When I click on and drag the vertical scrollbar it is very jerky or lags way behind the cursor. Please help.

Application Basics

Name: Firefox Version: 25.0 User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:25.0) Gecko/20100101 Firefox/25.0


Name: Adblock Plus Version: 2.4 Enabled: true ID: {d10d0bf8-f5b5-c8b4-a8b2-2b9879e08c5d}

Name: ClipConverter Version: 1.3.0 Enabled: true ID:

Name: DownloadHelper Version: 4.9.21 Enabled: true ID: {b9db16a4-6edc-47ec-a1f4-b86292ed211d}

Name: Logitech SetPoint Version: 6.5 Enabled: true ID: {F003DA68-8256-4b37-A6C4-350FA04494DF}

Name: NoSquint Version: 2.1.9 Enabled: true ID:

Name: SkipScreen Version: 0.7.2 Enabled: true ID: SkipScreen@SkipScreen

Name: SmoothWheel (AMO) Version: Enabled: true ID: {5F590AA2-1221-4113-A6F4-A4BB62414FAC}

Name: Stealthy Version: 2.5 Enabled: true ID:

Name: Tab Mix Plus Version: Enabled: true ID: {dc572301-7619-498c-a57d-39143191b318}

Name: Troubleshooter Version: 1.1a Enabled: true ID:

Name: Webroot Version: 2.0.0 Enabled: true ID: {8ac62a8b-8b3f-43ba-9b1a-90c299b9dfda}

Name: Webroot Filtering Extension Version: Enabled: true ID:

Name: YouTube mp3 Version: 1.0.4 Enabled: true ID:

Important Modified Preferences

accessibility.typeaheadfind.flashBar: 0 browser.cache.disk.capacity: 358400 browser.cache.disk.smart_size.first_run: false browser.cache.disk.smart_size.use_old_max: false browser.cache.disk.smart_size_cached_value: 358400 0 browser.places.smartBookmarksVersion: 4 true browser.sessionstore.upgradeBackup.latestBuildID: 20131025151332 browser.startup.homepage: browser.startup.homepage_override.buildID: 20131025151332 browser.startup.homepage_override.mstone: 25.0 browser.tabs.loadInBackground: false browser.tabs.onTop: false browser.zoom.siteSpecific: false dom.mozApps.used: true dom.w3c_touch_events.expose: false extensions.lastAppVersion: 25.0 font.internaluseonly.changed: false gfx.direct2d.disabled: true gfx.direct3d.last_used_feature_level_idx: 0 gfx.direct3d.prefer_10_1: true layers.acceleration.disabled: true false network.cookie.prefsMigrated: true places.database.lastMaintenance: 1384148932 places.history.expiration.transient_current_max_pages: 104858 plugin.disable_full_page_plugin_for_types: application/pdf plugin.importedState: true plugin.state.npqtplugin: 0 plugin.state.npvlc: 0 plugins.load_appdir_plugins: true print.printer_Brother_MFC-490CW_Printer.print_bgcolor: false print.printer_Brother_MFC-490CW_Printer.print_bgimages: false print.printer_Brother_MFC-490CW_Printer.print_colorspace: print.printer_Brother_MFC-490CW_Printer.print_command: print.printer_Brother_MFC-490CW_Printer.print_downloadfonts: false print.printer_Brother_MFC-490CW_Printer.print_duplex: 7274601 print.printer_Brother_MFC-490CW_Printer.print_edge_bottom: 0 print.printer_Brother_MFC-490CW_Printer.print_edge_left: 0 print.printer_Brother_MFC-490CW_Printer.print_edge_right: 0 print.printer_Brother_MFC-490CW_Printer.print_edge_top: 0 print.printer_Brother_MFC-490CW_Printer.print_evenpages: true print.printer_Brother_MFC-490CW_Printer.print_footercenter: print.printer_Brother_MFC-490CW_Printer.print_footerleft: &PT print.printer_Brother_MFC-490CW_Printer.print_footerright: &D print.printer_Brother_MFC-490CW_Printer.print_headercenter: print.printer_Brother_MFC-490CW_Printer.print_headerleft: &T print.printer_Brother_MFC-490CW_Printer.print_headerright: &U print.printer_Brother_MFC-490CW_Printer.print_in_color: true print.printer_Brother_MFC-490CW_Printer.print_margin_bottom: 0.5 print.printer_Brother_MFC-490CW_Printer.print_margin_left: 0.5 print.printer_Brother_MFC-490CW_Printer.print_margin_right: 0.5 print.printer_Brother_MFC-490CW_Printer.print_margin_top: 0.5 print.printer_Brother_MFC-490CW_Printer.print_oddpages: true print.printer_Brother_MFC-490CW_Printer.print_orientation: 0 print.printer_Brother_MFC-490CW_Printer.print_page_delay: 50 print.printer_Brother_MFC-490CW_Printer.print_paper_data: 1 print.printer_Brother_MFC-490CW_Printer.print_paper_height: 11.00 print.printer_Brother_MFC-490CW_Printer.print_paper_name: print.printer_Brother_MFC-490CW_Printer.print_paper_size_type: 0 print.printer_Brother_MFC-490CW_Printer.print_paper_size_unit: 0 print.printer_Brother_MFC-490CW_Printer.print_paper_width: 8.50 print.printer_Brother_MFC-490CW_Printer.print_plex_name: print.printer_Brother_MFC-490CW_Printer.print_resolution: 7602275 print.printer_Brother_MFC-490CW_Printer.print_resolution_name: print.printer_Brother_MFC-490CW_Printer.print_reversed: false print.printer_Brother_MFC-490CW_Printer.print_scaling: 1.00 print.printer_Brother_MFC-490CW_Printer.print_shrink_to_fit: false print.printer_Brother_MFC-490CW_Printer.print_to_file: false print.printer_Brother_MFC-490CW_Printer.print_unwriteable_margin_bottom: 0 print.printer_Brother_MFC-490CW_Printer.print_unwriteable_margin_left: 0 print.printer_Brother_MFC-490CW_Printer.print_unwriteable_margin_right: 0 print.printer_Brother_MFC-490CW_Printer.print_unwriteable_margin_top: 0 privacy.cpd.extensions-nosquint: false privacy.cpd.extensions-tabmix: false privacy.cpd.sessions: false privacy.sanitize.migrateFx3Prefs: true privacy.sanitize.timeSpan: 0 security.csp.enable: false security.OCSP.enabled: 0 security.warn_viewing_mixed: false storage.vacuum.last.index: 1 storage.vacuum.last.places.sqlite: 1383429755

user.js Preferences

Your profile folder contains a user.js file, which includes preferences that were not created by Firefox.


Adapter Description: ATI Radeon HD 4250 Adapter Drivers: aticfx64 aticfx64 aticfx32 aticfx32 atiumd64 atidxx64 atiumdag atidxx32 atiumdva atiumd6a atitmm64 Adapter RAM: 256 Device ID: 0x9715 DirectWrite Enabled: false (6.2.9200.16571) Driver Date: 11-16-2012 Driver Version: 8.970.100.7000 GPU #2 Active: false GPU Accelerated Windows: 0/3 Basic Vendor ID: 0x1002 WebGL Renderer: Google Inc. -- ANGLE (ATI Radeon HD 4250 Direct3D9Ex vs_3_0 ps_3_0) windowLayerManagerRemote: false AzureCanvasBackend: skia AzureContentBackend: none AzureFallbackCanvasBackend: cairo AzureSkiaAccelerated: 0


Incremental GC: true


Activated: true Prevent Accessibility: 0

Library Versions

NSPR Expected minimum version: 4.10.1 Version in use: 4.10.1

NSS Expected minimum version: 3.15.2 Basic ECC Version in use: 3.15.2 Basic ECC

NSSSMIME Expected minimum version: 3.15.2 Basic ECC Version in use: 3.15.2 Basic ECC

NSSSSL Expected minimum version: 3.15.2 Basic ECC Version in use: 3.15.2 Basic ECC

NSSUTIL Expected minimum version: 3.15.2 Version in use: 3.15.2

All Replies (3)

more options

Try Firefox Safe Mode to see if the problem goes away. Safe Mode is a troubleshooting mode, which disables most add-ons.

(If you're not using it, switch to the Default theme.)

  • On Windows you can open Firefox 4.0+ in Safe Mode by holding the Shift key when you open the Firefox desktop or Start menu shortcut.
  • On Mac you can open Firefox 4.0+ in Safe Mode by holding the option key while starting Firefox.
  • On Linux you can open Firefox 4.0+ in Safe Mode by quitting Firefox and then going to your Terminal and running: firefox -safe-mode (you may need to specify the Firefox installation path e.g. /usr/lib/firefox)
  • Or open the Help menu and click on the Restart with Add-ons Disabled... menu item while Firefox is running.


Once you get the pop-up, just select "'Start in Safe Mode" Safe Mode Fx 15 - Win

If the issue is not present in Firefox Safe Mode, your problem is probably caused by an extension, and you need to figure out which one. Please follow the Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems article for that.

To exit the Firefox Safe Mode, just close Firefox and wait a few seconds before opening Firefox for normal use again.

Please report back soon.

more options

Many site issues can be caused by corrupt cookies or cache. In order to try to fix these problems, the first step is to clear both cookies and the cache. Note: This will temporarily log you out of all sites you're logged in to. To clear cache and cookies do the following:

  1. Go to Firefox > History > Clear recent history or (if no Firefox button is shown) go to Tools > Clear recent history.
  2. Under "Time range to clear", select "Everything".
  3. Now, click the arrow next to Details to toggle the Details list active.
  4. From the details list, check Cache and Cookies and uncheck everything else.
  5. Now click the Clear now button.

Further information can be found in the Clear your cache, history and other personal information in Firefox article.

Did this fix your problems? Please report back soon.

more options

Try disabling graphics hardware acceleration. Since this feature was added to Firefox, it has gradually improved, but there still are a few glitches.

You might need to restart Firefox in order for this to take effect, so save all work first (e.g., mail you are composing, online documents you're editing, etc.).

Then perform these steps:

  • Click the orange Firefox button at the top left, then select the "Options" button, or, if there is no Firefox button at the top, go to Tools > Options.
  • In the Firefox options window click the Advanced tab, then select "General".
  • In the settings list, you should find the Use hardware acceleration when available checkbox. Uncheck this checkbox.
  • Now, restart Firefox and see if the problems persist.

Additionally, please check for updates for your graphics driver by following the steps mentioned in the following Knowledge base articles:

Did this fix your problems? Please report back soon.