In order to be able to find the correct solution to your problem, we require some more non-personal information from you. Please do the following:

• Click the Firefox button at the top left, then click the Help menu and select Troubleshooting Information from the submenu. If you don't have a Firefox button, click the Help menu at the top and select Troubleshooting Information from the menu.

Now, a new tab containing your troubleshooting information should open.

• At the top of the page, you should see a button that says "Copy text to clipboard". Click it.
• Now, go back to your forum post and click inside the reply box. Press Ctrl+V 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!

Application Basics

Name: Firefox Version: 24.0 User Agent: Mozilla/5.0 (Windows NT 6.0; rv:24.0) Gecko/20100101 Firefox/24.0

Extensions

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

Name: Adblock Plus Pop-up Addon Version: 0.9.1 Enabled: true ID: adblockpopups@jessehakanen.net

Name: DoNotTrackMe Version: 2.2.9.618 Enabled: true ID: donottrackplus@abine.com

Name: Flash and Video Download Version: 1.40 Enabled: true ID: {bee6eb20-01e0-ebd1-da83-080329fb9a3a}

Name: MaskMe Version: 1.27.318 Enabled: true ID: idme@abine.com

Name: Microsoft .NET Framework Assistant Version: 0.0.0 Enabled: true ID: {20a82645-c095-46ed-80e3-08825760534b}

Name: NoScript Version: 2.6.8.3 Enabled: true ID: {73a6fe31-595d-460b-a920-fcc0f8843232}

Name: Freemake Video Converter Plugin Version: 1.0.0 Enabled: false ID: fmconverter@gmail.com

Name: HP Smart Web Printing Version: 4.60 Enabled: false ID: smartwebprinting@hp.com

Important Modified Preferences

accessibility.blockautorefresh: true 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 browser.history_expire_days.mirror: 180 browser.places.smartBookmarksVersion: 4 browser.privatebrowsing.autostart: true browser.search.useDBForOrder: true browser.startup.homepage: http://www.telegraph.co.uk/?source=refresh browser.startup.homepage_override.buildID: 20130910160258 browser.startup.homepage_override.mstone: 24.0 browser.tabs.onTop: false browser.tabs.warnOnClose: false browser.urlbar.autocomplete.enabled: false dom.mozApps.used: true extensions.lastAppVersion: 24.0 font.default.x-western: sans-serif font.name.monospace.x-western: Arial font.name.serif.x-western: Garamond font.size.variable.x-western: 18 network.cookie.prefsMigrated: true network.http.max-persistent-connections-per-server: 4 places.database.lastMaintenance: 1381903559 places.history.expiration.transient_current_max_pages: 80371 plugin.disable_full_page_plugin_for_types: application/pdf plugin.importedState: true print.printer_HP_Photosmart_B110_series.print_bgcolor: false print.printer_HP_Photosmart_B110_series.print_bgimages: false print.printer_HP_Photosmart_B110_series.print_colorspace: print.printer_HP_Photosmart_B110_series.print_command: print.printer_HP_Photosmart_B110_series.print_downloadfonts: false print.printer_HP_Photosmart_B110_series.print_duplex: 0 print.printer_HP_Photosmart_B110_series.print_edge_bottom: 0 print.printer_HP_Photosmart_B110_series.print_edge_left: 0 print.printer_HP_Photosmart_B110_series.print_edge_right: 0 print.printer_HP_Photosmart_B110_series.print_edge_top: 0 print.printer_HP_Photosmart_B110_series.print_evenpages: true print.printer_HP_Photosmart_B110_series.print_footercenter: print.printer_HP_Photosmart_B110_series.print_footerleft: &PT print.printer_HP_Photosmart_B110_series.print_footerright: &D print.printer_HP_Photosmart_B110_series.print_headercenter: print.printer_HP_Photosmart_B110_series.print_headerleft: &T print.printer_HP_Photosmart_B110_series.print_headerright: &U print.printer_HP_Photosmart_B110_series.print_in_color: true print.printer_HP_Photosmart_B110_series.print_margin_bottom: 0.5 print.printer_HP_Photosmart_B110_series.print_margin_left: 0.5 print.printer_HP_Photosmart_B110_series.print_margin_right: 0.5 print.printer_HP_Photosmart_B110_series.print_margin_top: 0.5 print.printer_HP_Photosmart_B110_series.print_oddpages: true print.printer_HP_Photosmart_B110_series.print_orientation: 0 print.printer_HP_Photosmart_B110_series.print_page_delay: 50 print.printer_HP_Photosmart_B110_series.print_paper_data: 9 print.printer_HP_Photosmart_B110_series.print_paper_height: 11.00 print.printer_HP_Photosmart_B110_series.print_paper_name: print.printer_HP_Photosmart_B110_series.print_paper_size_type: 0 print.printer_HP_Photosmart_B110_series.print_paper_size_unit: 1 print.printer_HP_Photosmart_B110_series.print_paper_width: 8.50 print.printer_HP_Photosmart_B110_series.print_plex_name: print.printer_HP_Photosmart_B110_series.print_resolution: 0 print.printer_HP_Photosmart_B110_series.print_resolution_name: print.printer_HP_Photosmart_B110_series.print_reversed: false print.printer_HP_Photosmart_B110_series.print_scaling: 1.00 print.printer_HP_Photosmart_B110_series.print_shrink_to_fit: true print.printer_HP_Photosmart_B110_series.print_to_file: false print.printer_HP_Photosmart_B110_series.print_unwriteable_margin_bottom: 0 print.printer_HP_Photosmart_B110_series.print_unwriteable_margin_left: 0 print.printer_HP_Photosmart_B110_series.print_unwriteable_margin_right: 0 print.printer_HP_Photosmart_B110_series.print_unwriteable_margin_top: 0 print.printer_PDF995.print_bgcolor: false print.printer_PDF995.print_bgimages: false print.printer_PDF995.print_colorspace: print.printer_PDF995.print_command: print.printer_PDF995.print_downloadfonts: false print.printer_PDF995.print_duplex: 0 print.printer_PDF995.print_edge_bottom: 0 print.printer_PDF995.print_edge_left: 0 print.printer_PDF995.print_edge_right: 0 print.printer_PDF995.print_edge_top: 0 print.printer_PDF995.print_evenpages: true print.printer_PDF995.print_footercenter: print.printer_PDF995.print_footerleft: &PT print.printer_PDF995.print_footerright: &D print.printer_PDF995.print_headercenter: print.printer_PDF995.print_headerleft: &T print.printer_PDF995.print_headerright: &U print.printer_PDF995.print_in_color: true print.printer_PDF995.print_margin_bottom: 0.5 print.printer_PDF995.print_margin_left: 0.5 print.printer_PDF995.print_margin_right: 0.5 print.printer_PDF995.print_margin_top: 0.5 print.printer_PDF995.print_oddpages: true print.printer_PDF995.print_orientation: 0 print.printer_PDF995.print_page_delay: 50 print.printer_PDF995.print_paper_data: 9 print.printer_PDF995.print_paper_height: 11.00 print.printer_PDF995.print_paper_name: print.printer_PDF995.print_paper_size_type: 0 print.printer_PDF995.print_paper_size_unit: 1 print.printer_PDF995.print_paper_width: 8.50 print.printer_PDF995.print_plex_name: print.printer_PDF995.print_resolution: 0 print.printer_PDF995.print_resolution_name: print.printer_PDF995.print_reversed: false print.printer_PDF995.print_scaling: 1.00 print.printer_PDF995.print_shrink_to_fit: true print.printer_PDF995.print_to_file: false print.printer_PDF995.print_unwriteable_margin_bottom: 0 print.printer_PDF995.print_unwriteable_margin_left: 0 print.printer_PDF995.print_unwriteable_margin_right: 0 print.printer_PDF995.print_unwriteable_margin_top: 0 privacy.donottrackheader.enabled: true privacy.sanitize.migrateFx3Prefs: true storage.vacuum.last.index: 1 storage.vacuum.last.places.sqlite: 1381199973

user.js Preferences

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

Graphics

Adapter Description: NVIDIA GeForce 9200M GS Adapter Drivers: nvd3dum nvwgf2um Adapter RAM: 256 Device ID: 0x06e8 Direct2D Enabled: Blocked for your graphics driver version. Try updating your graphics driver to version 257.21 or newer. DirectWrite Enabled: false (7.0.6002.23200) Driver Date: 7-26-2008 Driver Version: 7.15.11.7624 GPU #2 Active: false GPU Accelerated Windows: 0/1 Basic Blocked for your graphics driver version. Try updating your graphics driver to version 182.65 or newer. Vendor ID: 0x10de WebGL Renderer: Blocked for your graphics driver version. Try updating your graphics driver to version 182.65 or newer. windowLayerManagerRemote: false AzureCanvasBackend: skia AzureContentBackend: none AzureFallbackCanvasBackend: cairo

JavaScript

Incremental GC: true

Accessibility

Activated: false Prevent Accessibility: 0

Library Versions

NSPR Expected minimum version: 4.10 Version in use: 4.10

NSS Expected minimum version: 3.15.1 Basic ECC Version in use: 3.15.1 Basic ECC

NSSSMIME Expected minimum version: 3.15.1 Basic ECC Version in use: 3.15.1 Basic ECC

NSSSSL Expected minimum version: 3.15.1 Basic ECC Version in use: 3.15.1 Basic ECC

NSSUTIL Expected minimum version: 3.15.1 Version in use: 3.15.1

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"

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.

When you figure out what's causing your issues, please let us know. It might help other users who have the same problem.

Thank you.

I opened Firefox in safe mode. The tab closure function worked normally.

I restarted it normally.... and the tab closure function worked normally!

Sorted.

Many thanks.

Application Basics

Name: Firefox Version: 26.0 User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:26.0) Gecko/20100101 Firefox/26.0

Extensions

Name: Firebug Version: 1.12.6 Enabled: true ID: firebug@software.joehewitt.com

Name: 1-Click YouTube Video Downloader Version: 2.2.5 Enabled: false ID: YoutubeDownloader@PeterOlayev.com

Name: Adblock Plus Version: 2.4.1 Enabled: false ID: {d10d0bf8-f5b5-c8b4-a8b2-2b9879e08c5d}

Name: Clear Cache Button Version: 0.9f Enabled: false ID: {563e4790-7e70-11da-a72b-0800200c9a66}

Name: DoNotTrackMe: Online Privacy Protection Version: 3.1.1038 Enabled: false ID: donottrackplus@abine.com

Name: DuckDuckGo Plus Version: 0.3.8 Enabled: false ID: jid1-ZAdIEUB7XOzOJw@jetpack

Name: F.B. Purity - Cleans Up Facebook Version: 9.3.2 Enabled: false ID: fbp@fbpurity.com

Name: JSONView Version: 0.7 Enabled: false ID: jsonview@brh.numbera.com

Name: Remove Cookies for Site Version: 0.63 Enabled: false ID: {06997db0-c027-4d5f-bd37-b0d9230226ea}

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 browser.places.smartBookmarksVersion: 4 browser.search.useDBForOrder: true browser.sessionstore.upgradeBackup.latestBuildID: 20131205075310 browser.startup.homepage: about:home browser.startup.homepage_override.buildID: 20131205075310 browser.startup.homepage_override.mstone: 26.0 browser.tabs.warnOnClose: false dom.mozApps.used: true dom.w3c_touch_events.enabled: 1 extensions.lastAppVersion: 26.0 gfx.direct3d.last_used_feature_level_idx: 0 network.cookie.prefsMigrated: true places.database.lastMaintenance: 1390897414 places.history.expiration.transient_current_max_pages: 104858 plugin.disable_full_page_plugin_for_types: application/pdf plugin.importedState: true plugin.state.java: 0 plugin.state.npappup: 0 plugin.state.npccplugin: 0 plugin.state.npctrl: 0 plugin.state.npdeployjava: 0 plugin.state.npgoogletalk: 0 plugin.state.npgoogleupdate: 0 plugin.state.npgtpo3dautoplugin: 0 plugin.state.npintelwebapiipt: 0 plugin.state.npintelwebapiupdater: 0 plugin.state.npo1d: 0 plugin.state.nptcplugin: 0 plugin.state.npvlc: 0 plugin.state.npwlpg: 0 privacy.donottrackheader.enabled: true privacy.sanitize.migrateFx3Prefs: true storage.vacuum.last.index: 1 storage.vacuum.last.places.sqlite: 1390210326

Graphics

Adapter Description: Intel(R) HD Graphics Adapter Drivers: igdumd64 igd10umd64 igd10umd64 igdumd32 igd10umd32 igd10umd32 Adapter RAM: Unknown Device ID: 0x0152 Direct2D Enabled: true DirectWrite Enabled: true (6.2.9200.16571) Driver Date: 9-26-2012 Driver Version: 9.17.10.2867 GPU #2 Active: false GPU Accelerated Windows: 1/1 Direct3D 10 Vendor ID: 0x8086 WebGL Renderer: Google Inc. -- ANGLE (Intel(R) HD Graphics Direct3D9Ex vs_3_0 ps_3_0) windowLayerManagerRemote: false AzureCanvasBackend: direct2d AzureContentBackend: direct2d AzureFallbackCanvasBackend: cairo AzureSkiaAccelerated: 0

JavaScript

Incremental GC: true

Accessibility

Activated: false Prevent Accessibility: 0

Library Versions

NSPR Expected minimum version: 4.10.2 Version in use: 4.10.2

NSS Expected minimum version: 3.15.3.1 Basic ECC Version in use: 3.15.3.1 Basic ECC

NSSSMIME Expected minimum version: 3.15.3.1 Basic ECC Version in use: 3.15.3.1 Basic ECC

NSSSSL Expected minimum version: 3.15.3.1 Basic ECC Version in use: 3.15.3.1 Basic ECC

NSSUTIL Expected minimum version: 3.15.3.1 Version in use: 3.15.3.1

sorry, not my issue. I have something else.