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Website requires Silverlight 4 (4.0.60831.0). How do I get Firefox to allow access to the now outdated but required plugin? Thanks

Posted

I used to have Firefox 18.0.1. Now have Firefox 19.0.2. I use a website where Silverlight 4 is required. Silverlight 5 is incompatible with the website. Firefox 18 allowed use of Silverlight 4. Firefox 19 has disabled the plugin as outdated. How can I force acceptance of Silverlight 4?

Chosen solution

Your plugins list shows a Silverlight 4 version (4.0.60831.0), so I'm not sure why you are asking this.

Do you get an icon that plugins are blocked on the location bar or only on the web page at the position where the plugin should be?

Read this answer in context 1

Additional System Details

Installed Plug-ins

  • Shockwave Flash 11.6 r602
  • iTunes Detector Plug-in
  • Google Update
  • RealPlayer(tm) LiveConnect-Enabled Plug-In
  • RealPlayer Download Plugin
  • Next Generation Java Plug-in 10.13.2 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.
  • Adobe Shockwave for Director Netscape plug-in, version 12.0
  • Adobe PDF Plug-In For Firefox and Netscape 11.0.01
  • Citrix Receiver Plugin (Win32)
  • RealNetworks(tm) RealDownloader Chrome Background Extension Plug-In
  • RealNetworks(tm) RealDownloader PepperFlashVideoShim Plug-In
  • RealNetworks(tm) RealDownloader HTML5VideoShim Plug-In
  • NVIDIA 3D Vision plugin for Mozilla browsers
  • NVIDIA 3D Vision Streaming plugin for Mozilla browsers
  • 4.0.60831.0
  • The plug-in allows you to open and edit files using Microsoft Office applications
  • Office Authorization plug-in for NPAPI browsers
  • np-mswmp

Application

  • Firefox 19.0.2
  • User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:19.0) Gecko/20100101 Firefox/19.0
  • Support URL: http://support.mozilla.org/1/firefox/19.0.2/WINNT/en-US/

Extensions

  • Troubleshooter 1.1a (troubleshooter@mozilla.org)
  • FiddlerHook 2.4.2.5 (fiddlerhook@fiddler2.com) (Inactive)

Javascript

  • incrementalGCEnabled: True

Graphics

  • adapterDescription: Intel(R) HD Graphics
  • adapterDescription2:
  • adapterDeviceID: 0x0152
  • adapterDeviceID2:
  • adapterDrivers: igdumd64 igd10umd64 igd10umd64 igdumd32 igd10umd32 igd10umd32
  • adapterDrivers2:
  • adapterRAM: Unknown
  • adapterRAM2:
  • adapterVendorID: 0x8086
  • adapterVendorID2:
  • direct2DEnabled: True
  • directWriteEnabled: True
  • directWriteVersion: 6.2.9200.16492
  • driverDate: 3-26-2012
  • driverDate2:
  • driverVersion: 8.15.10.2712
  • driverVersion2:
  • info: {u'AzureContentBackend': u'direct2d', u'AzureCanvasBackend': u'direct2d', u'AzureFallbackCanvasBackend': u'cairo'}
  • isGPU2Active: False
  • numAcceleratedWindows: 1
  • numTotalWindows: 1
  • webglRenderer: Google Inc. -- ANGLE (Intel(R) HD Graphics)
  • windowLayerManagerType: Direct3D 10

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.places.smartBookmarksVersion: 4
  • browser.privatebrowsing.autostart: True
  • browser.startup.homepage_override.buildID: 20130307023931
  • browser.startup.homepage_override.mstone: 19.0.2
  • dom.mozApps.used: True
  • extensions.checkCompatibility: False
  • extensions.lastAppVersion: 19.0.2
  • gfx.direct3d.prefer_10_1: True
  • network.cookie.prefsMigrated: True
  • places.database.lastMaintenance: 1363265204
  • places.history.expiration.transient_current_max_pages: 104858
  • plugin.disable_full_page_plugin_for_types: application/pdf
  • privacy.donottrackheader.enabled: True
  • privacy.sanitize.migrateFx3Prefs: True

Misc

  • User JS: No
  • Accessibility: No
Andrew
  • Top 25 Contributor
  • Moderator
251 solutions 3016 answers

Have you tried uninstalling the current version of Silverlight and installing version 4? What happens when you try to install version 4? What is the error message you are receiving?

cor-el
  • Top 10 Contributor
  • Moderator
10749 solutions 96724 answers

Chosen Solution

Your plugins list shows a Silverlight 4 version (4.0.60831.0), so I'm not sure why you are asking this.

Do you get an icon that plugins are blocked on the location bar or only on the web page at the position where the plugin should be?

Helpful Reply

Thanks for the response but cor-el's response has got me in.

Question owner

I have been activating the Silverlight 4 plugin on each access attempt which resulted in a black screen. Your first link showed me an option I had not noticed before 'Always activate plugins for this site'. Using this has got me into the website. Thanks.