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Cannot install any add-ons

Posted

This is the error message. Firefox could not install the file at

https://addons.mozilla.org/firefox/downloads/file/114495/google_shortcuts_all_google_services_at_a_glance-2.1.6-fx.xpi?src=api

because: Unexpected installation error Review the Error Console log for more details. -203

Additional System Details

This happened

Every time Firefox opened

This started when...

i try to install an add-on

Installed Plug-ins

  • Shockwave Flash 10.3 r181
  • Office Plugin for Netscape Navigator
  • Adobe PDF Plug-In For Firefox and Netscape 10.1.0
  • Default Plug-in
  • 12.0.1.647
  • RealPlayer(tm) LiveConnect-Enabled Plug-In
  • RealJukebox Netscape Plugin
  • NPRuntime Script Plug-in Library for Java(TM) Deploy
  • Adobe Shockwave for Director Netscape plug-in, version 11.6
  • iTunes Detector Plug-in
  • GEPlugin
  • Picasa plugin
  • Next Generation Java Plug-in 1.6.0_26 for Mozilla browsers
  • Yahoo Application State Plugin version 1.0.0.7
  • 4.0.60531.0
  • RealPlayer(tm) HTML5VideoShim Plug-In
  • RealNetworks(tm) RealPlayer Chrome Background Extension Plug-In
  • Google Update

Application

  • User Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-GB; rv:1.9.2.18) Gecko/20110614 Firefox/3.6.18 GTB7.1

More Information

Hasan 477 solutions 5600 answers

-> Tap ALT key or press F10 to show the Menu Bar

-> go to Help Menu -> select "Restart with Add-ons Disabled"

Firefox will close then it will open up with just basic Firefox. Now do this:

-> Update Firefox to the latest version by going to Help Menu -> About Firefox -> click Check for Updates -> if an updated version is found then download the latest version and install it. After that follow these steps:

-> Update ALL your Firefox Plug-ins https://www.mozilla.com/en-US/plugincheck/

-> go to View Menu -> Zoom -> click Reset -> Page Style -> select Basic Page Style

-> go to View Menu -> Toolbars -> unselect All Incompatible/Unwanted toolbars

-> go to Tools Menu -> Clear Recent History -> Time range to clear: select EVERYTHING -> click Details (small arrow) button -> place Checkmarks on Cookies, Cache -> click Clear Now

-> go to Tools Menu -> Options -> Security -> place Checkmarks on:

1) Warn me when sites try to install add-ons 2) Block reported attack sites 3) Block reported web forgeries 4) Remember Passwords for sites

-> go to Tools Menu -> Options -> Advanced -> Network -> Offline Storage (Cache): click Clear Now button

-> Click OK on Options window

-> click the Favicon on SearchBar -> click Manage Search Engines -> select all Unwanted Search Engines and click Remove -> click OK

-> go to Tools Menu -> Add-ons -> Extensions section -> REMOVE All Unwanted/Suspicious Extensions (Add-ons) -> Restart Firefox

-> go to Tools Menu -> Add-ons -> Appearance section -> REMOVE All Incompatible/Unwanted/Suspicious Themes (Persona) -> Restart Firefox

You can enable your Known & Trustworthy Add-ons and Themes later. Check and tell if its working.