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When I try to open a hyperlink on a Word doc a new tab opens as e.g. https://twitter.com/trixiemckFirefoxHTML%5CShell%5COpen%5CCommand (this is my own Tw acct)


The hyperlink looks ok but I can't open it by just clicking the left button on the mouse (which I have done for 15 years) and when hovering over it the yellow box appears telling me to use "Ctrl+click to follow hyperlink". And then it takes me nowhere. Twitter opens but with the non-existing address I pasted above. I tried a hyperlink on my invoice template and while the page opens ok, it still looks weird http://www.proz.com/profile/25014FirefoxHTML%5CShell%5COpen%5CCommand. I know I can shift to IE but I did it last week and it took me quite a few hours to go back to Firefox.

Additional System Details

Installed Plug-ins

  • Next Generation Java Plug-in 10.11.2 for Mozilla browsers
  • NPRuntime Script Plug-in Library for Java(TM) Deploy
  • Shockwave Flash 11.5 r502
  • Adobe PDF Plug-In For Firefox and Netscape 10.1.4
  • RealJukebox Netscape Plugin
  • RealPlayer(tm) HTML5VideoShim Plug-In
  • RealPlayer(tm) LiveConnect-Enabled Plug-In
  • RealPlayer Download Plugin
  • The QuickTime Plugin allows you to view a wide variety of multimedia content in Web pages. For more information, visit the QuickTime Web site.
  • iTunes Detector Plug-in
  • Version 0.9.18, Copyright 2006-2009 Veetle Inchttp://www.veetle.com/
  • Version 0.9.18, copyright 2006-2010 Veetle Inchttp://www.veetle.com/
  • DRM Netscape Network Object
  • Npdsplay dll
  • DRM Store Netscape Plugin


  • User Agent: Mozilla/5.0 (Windows NT 5.1; rv:18.0) Gecko/20100101 Firefox/18.0

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  • Top 10 Contributor
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10762 solutions 96861 answers

That is a problem with backslashes (\) instead of forward slashes (/) in that URL as you can see if you hover this link with the mouse.

Firefox escapes such backslashes as %5C

Edit: This looks that some registry key data gets appended to the link: FirefoxHTML\Shell\Open\Command

And that the link should be this:

You can check for issues caused by DDE:

Modified by cor-el

Question owner

The add-on didn't work for me. However I visited the link and on following the instructions found out that when I reached "select extension --> NONE --> File Type URL Hyper Text Transfer Protocol it was to be opened with Internet Explorer (which I haven't used for years). So I fixed that and now can open the hyperlinks. However, I never had to use Ctrl+click to open a hyperlink on a Word doc before and don't know why this has changed overnight.