Firefox 21 does notrecognize Windows Media Player plugin

Firefox 21 on Windows 7 x64 Home Premium.
1.
I am a regular watcher of the Israeli TV at http://www.iba.org.il/. This was working fine until a couple of weeks ago, when I started getting prompts that a plugin is missing.When I click on the prompt to get the plugin, I am told it is unavailable and I am asked to get Windows Media Player 11 plugin manually. I downloaded and installed it a couple of times, but it does not appear in the FF plugin list.
There have been no changes on my laptop.
2.
Another problem seems to be that each first search I do on Google, I am getting some page that is trying to sell me something; the following searches are OK. I figured some malware/hijack but several security programs have not found anything.
Please advise. Thanks.

There has been a change in where Firefox searches for plugins and the plugins folder in the Firefox program folder is no longer scanned for plugins, so Firefox won't find them anymore if they are installed in the plugins folder instead of the "browser\plugins" folder that Firefox now scans.
You can set the plugins.load_appdir_plugins pref to true on the about:config page to make Firefox scan the "<install>/plugins/" directory for plugins like the WMP plugin (np-mswmp.dll).
You can alternatively move plugins from "<install directory>\plugins\" to "<install directory>\browser\plugins\" to make Firefox find them again.
*http://www.ghacks.net/2013/05/15/why-you-may-have-lost-access-to-plugins-or-extensions-in-firefox-21/
*http://mike.kaply.com/2013/04/24/major-changes-coming-in-firefox-21/

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[http://groups.google.com/group/mozilla.support.firefox/browse_thread/thread/f381fb349c4d109d/69bef0011240e600?hl=en&ie=UTF-8&oe=utf-8 Windows Media Player will not install in Firefox 4] <br>
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Do note - if your Windows 7 OS is a 64-bit version, make sure that the plugin actually ends up in the Mozilla Firefox plugin folder (default '''C:\Program Files (x86)\Mozilla Firefox\plugins\'''). There are reports of the plugin (or actually Firefox) ending up in the wrong folder. 64-bit Windows systems has 2 Program Folder locations - "Program Files" for 64-bit applications, and "Program Files (x86)" for 32-bit applications.
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