Installing Firefox for Windows and the Silverlight plug-in in WINE

I use 64-bit (~amd64) multilib Gentoo Linux on my main laptop, and had been using successfully Version 0.2.3 of the Pipelight browser plug-in in 64-bit Firefox 29.0.1 for Linux to access an office Intranet Web site that uses Microsoft Silverlight. However, after installing 64-bit Firefox 30.0 for Linux recently I found that Mozilla has removed NPAPI support by default in Firefox 30, and Web sites using Silverlight would no longer load.

By updating Pipelight to Version 0.2.6 and changing the user agent string — see ‘Firefox UserAgent Switcher list‘ — I was able to browse in Firefox 30.0 for Linux only some of the Web sites that use Silverlight, but the aforementioned Intranet Web site would no longer load and displayed the following error message instead:

It appears the browser you are using to access this site is unsupported. Please use one of the following browsers …

· Internet Explorer 8.0

· Internet Explorer 9.0

· Internet Explorer 10.0

If you are using one of these browsers and you are still seeing this message, please contact company support.

I tried changing Firefox’s user agent string to the following, which I found from the post ‘Firefox UserAgent Switcher list‘:

Mozilla/5.0 (compatible; MSIE 10.6; Windows NT 6.1; Trident/5.0; InfoPath.2; SLCC1; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; .NET CLR 2.0.50727) 3gpp-gba UNTRUSTED/1.0

That user agent string allowed the Intranet’s Web page to start loading, but a window popped-up displaying the error message shown below and Firefox stopped responding (froze).

Error reading Localization file

[Xml_UnexpectedTokens2]
Arguments: Content-Type,”,’,4,18
Debugging resource strings unavailable. Often the key and arguments provide
sufficient information to diagnose the problem. See http://go.microsoft.com/fwlink/?
linkid=106663&Version=5.1.30214.00&File=System.Xml.dll&Key=Xml_UnexpectedTokens2

After trying various user agent strings without success I decided to install 64-bit Firefox 30.0 for Windows and the 64-bit Silverlight plug-in in WINE. The 64-bit Firefox 30.0 for Windows installed successfully and I could launch it and browse the Internet. However, I found that the 64-bit Silverlight plug-in would not install (according to a message in the Silverlight Installer window, installation of the plug-in crashed at 82% complete), so I then installed 32-bit Firefox 30.0 for Windows with the 32-bit Silverlight plug-in, and that worked. Below I list the steps I used to install and configure 32-bit Firefox 30.0 with the 32-bit Silverlight plug-in in WINE (which, in my installation, was compiled to support both 32-bit and 64-bit Windows applications).

Installation and configuration of 32-bit Firefox for Windows and the Silverlight plug-in

1. I used a Web browser to download the file ‘Firefox Setup 30.0.exe‘ from the Mozilla Firefox Web site to the /home/fitzcarraldo/Downloads/ directory. The Mozilla Web site offers a choice of localised versions, so I downloaded the installer for Firefox for Windows in British English.

2. I opened a Konsole window and entered the following commands:

$ cd
$ export WINEPREFIX=$HOME/.wine-firefox
$ export WINEARCH="win32"
$ winecfg # Set Windows Version to Window 7.
$ cd ./.wine-firefox/drive_c/
$ wget http://winetricks.org/winetricks # Download winetricks so I can install Windows fonts.
$ chmod +x winetricks # Make winetricks script executable.
$ ./winetricks # Launch winetricks and install Windows fonts.
$ cp /home/fitzcarraldo/Downloads/Firefox\ Setup\ 30.0.exe .
$ wine Firefox\ Setup\ 30.0.exe
$ env WINEPREFIX="/home/fitzcarraldo/.wine-firefox" WINEARCH="win32" wine /home/fitzcarraldo/.wine-firefox/drive_c/Program\ Files/Mozilla\ Firefox/firefox.exe # Launch Firefox and download the Silverlight installer.

N.B. Keep the Konsole window open and use it to enter all the commands listed in this post.

Notice that I downloaded and launched the excellent winetricks script so that I could install some Windows fonts that Firefox for Windows might need to use. When the winetricks window opens, all I needed to do was:

  • Select ‘Select the default wineprefix’ and click ‘OK’
  • Select ‘Install a font’and click ‘OK’.
  • Select ‘allfonts’ and click ‘OK’.
  • Optionally, if you have an LCD monitor and you would like to enable subpixel font smoothing, select ‘Change Settings’ then ‘fontsmooth=rgb’ and click ‘OK’.

3. I used the 32-bit Firefox for Windows Web browser to download the Silverlight plug-in installer to the /home/fitzcarraldo/Downloads/ directory. The files downloaded were Silverlight.exe and Silverlight.exe:Zone.Identifier which were both downloaded when I clicked on the ‘Click to Install’ button on the ‘Get Microsoft Silverlight‘ Web page and I then moved them from the directory /home/fitzcarraldo/Desktop/ to the /home/fitzcarraldo/Downloads/ directory.

4. I exited Firefox for Windows and installed the Silverlight plug-in:

$ cp /home/fitzcarraldo/Downloads/Silverlight* .
$ wine Silverlight.exe # Now install 32-bit Silverlight.

5. Then I launched Firefox for Windows again to configure the User Agent:

$ env WINEPREFIX="/home/fitzcarraldo/.wine-firefox" WINEARCH="win32" wine /home/fitzcarraldo/.wine-firefox/drive_c/Program\ Files/Mozilla\ Firefox/firefox.exe

I entered ‘about:config‘ (without the quotes) in the Address bar and added a new preference named general.useragent.override containing the following string (it is a User Agent string for Microsoft Internet Explorer 10.6 in 32-bit Windows 7):

Mozilla/5.0 (compatible; MSIE 10.6; Windows NT 6.1; Trident/5.0; InfoPath.2; SLCC1; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; .NET CLR 2.0.50727) 3gpp-gba UNTRUSTED/1.0

N.B. This is the user agent string I used to get a specific office’s Intranet Web site that uses Silverlight to load in the Firefox 30.0 for Windows browser. You may need to use a different user agent string for the particular Web site you want to load. Use a search engine to search the Web for suitable user agent strings for the specific Web site you wish to browse. I have seen various user agent strings given for Netflix, for example, so you may have to try several to find one that works for you.

Alternatively, rather than using about:config you could install a Firefox extension such as User Agent Switcher and the associated ‘useragentswitcher.xml‘ file (see the ‘Firefox UserAgent Switcher list’ reference above for details of how to install), which would allow you to add, edit and select user agent strings more easily. An alternative to User Agent Switcher is the Firefox extension User Agent Overrider which may give you better results than User Agent Switcher on some Web sites that use Silverlight. I have tried it and it enables me to view the Silverlight test pages on the Web (I selected ‘Windows / Firefox 29′ from the User Agent Overrider pull-down menu).

6. I also made sure that plugins.click_to_play is set to ‘true’ (it should be by default) and I gave permission to Firefox to use the Silverlight plug-in on the relevant Web site I wish to use (Open menu > Add-ons > Plugins). See ‘Issues related to plugins – 4.1 Click to Play in Mozilla browser versions 23 and above‘ on the mozillaZine Website and ‘How to always activate a plugin for a trusted website‘ on the Mozilla Support Website.

Launching Firefox for Windows correctly in Linux

To launch Firefox for Windows from the command line you will need to enter either of the following commands:

$ env WINEPREFIX="/home/fitzcarraldo/.wine-firefox" WINEARCH="win32" wine /home/fitzcarraldo/.wine-firefox/drive_c/Program\ Files/Mozilla\ Firefox/firefox.exe

$ env WINEPREFIX="/home/fitzcarraldo/.wine-firefox" WINEARCH="win32" wine C:\\windows\\command\\start.exe /Unix /home/fitzcarraldo/.wine-firefox/dosdevices/c:/users/Public/Start\ Menu/Programs/Mozilla\ Firefox.lnk

Alternatively, you can set up a Desktop Configuration File (.desktop file) on your Desktop and/or an entry in the Desktop Environment’s launcher menu. In my case, WINE took care of doing both of those during the installation of Firefox for Windows, and it used the standard Firefox icon. I just needed to edit the entry’s command for launching Firefox, to make it match one of the commands listed above.

Postscript

Regarding the file Silverlight.exe:Zone.Identifier that was downloaded when I downloaded the Silverlight installer (Silverlight.exe), I had never come across such a file type before but have now found out what it is:

File that contains metadata describing the security zones associated with another file; generated automatically when a file is downloaded from the Internet or received as an email attachment; often created by Internet Explorer.

See the article .ZONE.IDENTIFIER File Extension for details.

You can therefore forget about the Silverlight.exe:Zone.Identifier file (if one even exists in your case). The important thing is to download the Silverlight installer, which is a single .exe file.

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About Fitzcarraldo
A Linux user with an interest in all things technical.

One Response to Installing Firefox for Windows and the Silverlight plug-in in WINE

  1. Pingback: Installing and using the Pipelight browser plug-in with Firefox 30 for Linux | Fitzcarraldo's Blog

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