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Error, lightbeam could not be installed because Firefox cannot modify the needed file.

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Was trying to install the addon Lightbeam and keep getting the error. I am using version 24 on Firefox and the latest version of Lightbeam.

Was trying to install the addon Lightbeam and keep getting the error. I am using version 24 on Firefox and the latest version of Lightbeam.

Additional System Details

Installed Plug-ins

  • Google Update
  • RealPlayer(tm) LiveConnect-Enabled Plug-In
  • RealPlayer Download Plugin
  • Shockwave Flash 11.9 r900
  • SiteAdvisor
  • Adobe PDF Plug-In For Firefox and Netscape 11.0.05
  • 5.1.20913.0
  • DivX Web Player version 3.0.0.155
  • RealNetworks(tm) RealDownloader Chrome Background Extension Plug-In
  • RealNetworks(tm) RealDownloader PepperFlashVideoShim Plug-In
  • RealNetworks(tm) RealDownloader HTML5VideoShim Plug-In
  • RealDownloader Plugin
  • GEPlugin
  • Next Generation Java Plug-in 10.25.2 for Mozilla browsers
  • NPRuntime Script Plug-in Library for Java(TM) Deploy
  • The QuickTime Plugin allows you to view a wide variety of multimedia content in Web pages. For more information, visit the QuickTime Web site.
  • McAfee MSS+ NPAPI Plugin
  • NPWLPG
  • DivX VOD Helper Plug-in
  • The plug-in allows you to open and edit files using Microsoft Office applications
  • Office Authorization plug-in for NPAPI browsers

Application

  • User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:24.0) Gecko/20100101 Firefox/24.0

More Information

Application Basics
------------------
Name: Firefox
Version: 24.0
User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:24.0) Gecko/20100101 Firefox/24.0
Extensions
----------
Name: Address Bar Search
Version: 1.0
Enabled: true
ID: {badea1ae-72ed-4f6a-8c37-4db9a4ac7bc9}
Name: BetterPrivacy
Version: 1.68
Enabled: true
ID: {d40f5e7b-d2cf-4856-b441-cc613eeffbe3}
Name: Download Youtube Videos +
Version: 12.9.6
Enabled: true
ID: video.downloader.plugin@ffpimp.com
Name: Freemake Video Downloader Plugin
Version: 1.0.0
Enabled: true
ID: fmdownloader@gmail.com
Name: Freemake Youtube Download Button
Version: 1.0.0
Enabled: true
ID: ytfmdownloader@gmail.com
Name: Google Bookmarks for Firefox
Version: 0.7
Enabled: true
ID: {473f9a20-ce5a-11da-a94d-0800200c9a66}
Name: LastPass
Version: 2.5.0
Enabled: true
ID: support@lastpass.com
Name: McAfee SiteAdvisor
Version: 3.6.3
Enabled: true
ID: {4ED1F68A-5463-4931-9384-8FFF5ED91D92}
Name: Personas Plus
Version: 1.7.2.1
Enabled: true
ID: personas@christopher.beard
Name: Skype Click to Call
Version: 6.12.0.13601
Enabled: true
ID: {82AF8DCA-6DE9-405D-BD5E-43525BDAD38A}
Name: Freeze.com NetAssistant
Version: 3.6.5
Enabled: false
ID: {1266764D-FC4F-4FA7-B63B-884D53B1680F}
Name: Google Gears
Version: 0.5.36.0
Enabled: false
ID: {000a9d1c-beef-4f90-9363-039d445309b8}
Name: HP Smart Web Printing
Version: 4.60
Enabled: false
ID: smartwebprinting@hp.com
Name: Microsoft .NET Framework Assistant
Version: 1.2.1
Enabled: false
ID: {20a82645-c095-46ed-80e3-08825760534b}
Name: NewTabURL
Version: 2.2.3
Enabled: false
ID: newtaburl@sogame.cat
Name: NoScript
Version: 2.6.8.2rc2
Enabled: false
ID: {73a6fe31-595d-460b-a920-fcc0f8843232}
Name: Sxipper
Version: 2.3.4
Enabled: false
ID: sxipper@sxip.com
Important Modified Preferences
------------------------------
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.display.background_color: #C0C0C0
browser.display.use_system_colors: true
browser.history_expire_days.mirror: 180
browser.places.importBookmarksHTML: false
browser.places.importDefaults: false
browser.places.leftPaneFolderId: -1
browser.places.migratePostDataAnnotations: false
browser.places.smartBookmarksVersion: 4
browser.places.updateRecentTagsUri: false
browser.search.param.yahoo-fr: chr-greentree_ff&ilc=12&type=937811
browser.search.useDBForOrder: true
browser.startup.homepage_override.buildID: 20130910160258
browser.startup.homepage_override.mstone: 24.0
dom.mozApps.used: true
dom.w3c_touch_events.expose: false
extensions.lastAppVersion: 24.0
general.useragent.extra.microsoftdotnet: ( .NET CLR 3.5.30729; .NET4.0C)
gfx.direct3d.last_used_feature_level_idx: 0
gfx.direct3d.prefer_10_1: true
keyword.URL: http://search.yahoo.com/search?fr=mcafee&p=
network.cookie.prefsMigrated: true
places.database.lastMaintenance: 1382719924
places.history.expiration.transient_current_max_pages: 104858
places.history.expiration.transient_optimal_database_size: 167772160
places.last_vacuum: 1299342723
plugin.disable_full_page_plugin_for_types: application/pdf
plugin.importedState: true
plugin.state.nprtharmonyplugin: 0
plugin.state.npwpf: 0
print.print_printer: HP Officejet 7400 series
print.printer_HP_Officejet_7400_series.print_bgcolor: false
print.printer_HP_Officejet_7400_series.print_bgimages: false
print.printer_HP_Officejet_7400_series.print_command:
print.printer_HP_Officejet_7400_series.print_downloadfonts: false
print.printer_HP_Officejet_7400_series.print_edge_bottom: 0
print.printer_HP_Officejet_7400_series.print_edge_left: 0
print.printer_HP_Officejet_7400_series.print_edge_right: 0
print.printer_HP_Officejet_7400_series.print_edge_top: 0
print.printer_HP_Officejet_7400_series.print_evenpages: true
print.printer_HP_Officejet_7400_series.print_footercenter:
print.printer_HP_Officejet_7400_series.print_footerleft: &PT
print.printer_HP_Officejet_7400_series.print_footerright: &D
print.printer_HP_Officejet_7400_series.print_headercenter:
print.printer_HP_Officejet_7400_series.print_headerleft: &T
print.printer_HP_Officejet_7400_series.print_headerright: &U
print.printer_HP_Officejet_7400_series.print_in_color: true
print.printer_HP_Officejet_7400_series.print_margin_bottom: 0.5
print.printer_HP_Officejet_7400_series.print_margin_left: 0.5
print.printer_HP_Officejet_7400_series.print_margin_right: 0.5
print.printer_HP_Officejet_7400_series.print_margin_top: 0.5
print.printer_HP_Officejet_7400_series.print_oddpages: true
print.printer_HP_Officejet_7400_series.print_orientation: 0
print.printer_HP_Officejet_7400_series.print_page_delay: 50
print.printer_HP_Officejet_7400_series.print_pagedelay: 500
print.printer_HP_Officejet_7400_series.print_paper_data: 1
print.printer_HP_Officejet_7400_series.print_paper_height: 11.00
print.printer_HP_Officejet_7400_series.print_paper_size_type: 0
print.printer_HP_Officejet_7400_series.print_paper_size_unit: 0
print.printer_HP_Officejet_7400_series.print_paper_width: 8.50
print.printer_HP_Officejet_7400_series.print_reversed: false
print.printer_HP_Officejet_7400_series.print_scaling: 0.60
print.printer_HP_Officejet_7400_series.print_shrink_to_fit: true
print.printer_HP_Officejet_7400_series.print_to_file: false
print.printer_HP_Officejet_7400_series.print_unwriteable_margin_bottom: 0
print.printer_HP_Officejet_7400_series.print_unwriteable_margin_left: 0
print.printer_HP_Officejet_7400_series.print_unwriteable_margin_right: 0
print.printer_HP_Officejet_7400_series.print_unwriteable_margin_top: 0
print.printer_QuickBooks_PDF_Converter.print_bgcolor: false
print.printer_QuickBooks_PDF_Converter.print_bgimages: false
print.printer_QuickBooks_PDF_Converter.print_command:
print.printer_QuickBooks_PDF_Converter.print_downloadfonts: false
print.printer_QuickBooks_PDF_Converter.print_edge_bottom: 0
print.printer_QuickBooks_PDF_Converter.print_edge_left: 0
print.printer_QuickBooks_PDF_Converter.print_edge_right: 0
print.printer_QuickBooks_PDF_Converter.print_edge_top: 0
print.printer_QuickBooks_PDF_Converter.print_evenpages: true
print.printer_QuickBooks_PDF_Converter.print_footercenter:
print.printer_QuickBooks_PDF_Converter.print_footerleft: &PT
print.printer_QuickBooks_PDF_Converter.print_footerright: &D
print.printer_QuickBooks_PDF_Converter.print_headercenter:
print.printer_QuickBooks_PDF_Converter.print_headerleft: &T
print.printer_QuickBooks_PDF_Converter.print_headerright: &U
print.printer_QuickBooks_PDF_Converter.print_in_color: true
print.printer_QuickBooks_PDF_Converter.print_margin_bottom: 0.5
print.printer_QuickBooks_PDF_Converter.print_margin_left: 0.5
print.printer_QuickBooks_PDF_Converter.print_margin_right: 0.5
print.printer_QuickBooks_PDF_Converter.print_margin_top: 0.5
print.printer_QuickBooks_PDF_Converter.print_oddpages: true
print.printer_QuickBooks_PDF_Converter.print_orientation: 0
print.printer_QuickBooks_PDF_Converter.print_pagedelay: 500
print.printer_QuickBooks_PDF_Converter.print_paper_data: 1
print.printer_QuickBooks_PDF_Converter.print_paper_height: 11.00
print.printer_QuickBooks_PDF_Converter.print_paper_size_type: 0
print.printer_QuickBooks_PDF_Converter.print_paper_size_unit: 0
print.printer_QuickBooks_PDF_Converter.print_paper_width: 8.50
print.printer_QuickBooks_PDF_Converter.print_reversed: false
print.printer_QuickBooks_PDF_Converter.print_scaling: 0.60
print.printer_QuickBooks_PDF_Converter.print_shrink_to_fit: true
print.printer_QuickBooks_PDF_Converter.print_to_file: false
print.printer_QuickBooks_PDF_Converter.print_unwriteable_margin_bottom: 0
print.printer_QuickBooks_PDF_Converter.print_unwriteable_margin_left: 0
print.printer_QuickBooks_PDF_Converter.print_unwriteable_margin_right: 0
print.printer_QuickBooks_PDF_Converter.print_unwriteable_margin_top: 0
privacy.sanitize.migrateFx3Prefs: true
security.warn_viewing_mixed: false
security.warn_viewing_mixed.show_once: false
storage.vacuum.last.index: 0
storage.vacuum.last.places.sqlite: 1381149477
Graphics
--------
Adapter Description: ATI Radeon HD 3870 X2
Adapter Drivers: aticfx64 aticfx64 aticfx32 aticfx32 atiumd64 atidxx64 atiumdag atidxx32 atiumdva atiumd6a atitmm64
Adapter RAM: 512
Device ID: 0x950f
Direct2D Enabled: true
DirectWrite Enabled: true (6.2.9200.16571)
Driver Date: 4-5-2012
Driver Version: 8.961.0.0
GPU #2 Active: false
GPU Accelerated Windows: 1/1 Direct3D 10
Vendor ID: 0x1002
WebGL Renderer: Google Inc. -- ANGLE (ATI Radeon HD 3870 X2 Direct3D9Ex vs_3_0 ps_3_0)
windowLayerManagerRemote: false
AzureCanvasBackend: direct2d
AzureContentBackend: direct2d
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

Wesley Branton
  • Top 25 Contributor
406 solutions 3860 answers

Try downloading from here if you have not already tried.

Please ensure that McAfee is not interfering with the installation process.

Try downloading from [https://addons.mozilla.org/en-US/firefox/addon/lightbeam/?src=ss here] if you have not already tried. Please ensure that McAfee is not interfering with the installation process.

Question owner

I shut my anti-virus off and tried to install for the link you included. Same results.

I shut my anti-virus off and tried to install for the link you included. Same results.
Wesley Branton
  • Top 25 Contributor
406 solutions 3860 answers

Ensure that there is not a user.js file located in your Firefox profile folder or the program directory.

If there is, please delete it.

Ensure that there is not a <code>user.js</code> file located in your Firefox profile folder or the program directory. If there is, please delete it.
cor-el
  • Top 10 Contributor
  • Moderator
16403 solutions 147987 answers

Helpful Reply

You get this error if you install an extension that needs to be unpacked in order to work properly, but this isn't happening. The default is to copy the file to the extensions folder and rename the file part to the ID of the extension.

You can try to set the extensions.alwaysUnpack pref(s) on the about:config page to true.


It is possible that there is a problem with the file(s) that store the extensions registry.

Delete the extensions.* files (e.g. extensions.sqlite, extensions.ini) and compatibility.ini in the Firefox profile folder to reset the extensions registry.

New files will be created when required.

See "Corrupt extension files":

If you see disabled or not compatible extensions in "Firefox/Tools > Add-ons > Extensions" then click the Tools button at the left end side of the Search Bar to check if there is a compatibility update available.

If this hasn't helped then also delete the addons.sqlite file if present.

You get this error if you install an extension that needs to be unpacked in order to work properly, but this isn't happening. The default is to copy the file to the extensions folder and rename the file part to the ID of the extension. *https://developer.mozilla.org/En/Updating_extensions_for_Firefox_4.0#XPI_unpacking You can try to set the extensions.alwaysUnpack pref(s) on the <b>about:config</b> page to true. ---- It is possible that there is a problem with the file(s) that store the extensions registry. Delete the extensions.* files (e.g. extensions.sqlite, extensions.ini) and compatibility.ini in the Firefox profile folder to reset the extensions registry. *https://support.mozilla.org/kb/Profiles New files will be created when required. See "Corrupt extension files": *http://kb.mozillazine.org/Unable_to_install_themes_or_extensions *https://support.mozilla.org/kb/Unable+to+install+add-ons If you see disabled or not compatible extensions in "Firefox/Tools > Add-ons > Extensions" then click the Tools button at the left end side of the Search Bar to check if there is a compatibility update available. If this hasn't helped then also delete the addons.sqlite file if present.