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Checking plugins -> Unknown Plugin -> Research -> 404 File Not Found

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Checking plugin status, two are listed as "Unknown Plugin"

The buttons offering to research them result in a 404 File Not Found.

The buttons link to[[ https://www.mozilla.org/en-US/plugincheck/null]] which comes up with:

Whoops! What are you doing here?

Did you make a left at that last URL instead of a right? No problem. Unless you want us to deal you in, here are some tips to get you back on your way:

   If you typed in the address, check your spelling. Could just be a typo.
   If you followed a link, it’s probably broken. Please contact us and we’ll fix it.
   If you’re not sure what you’re looking for, start at mozilla.org.
Checking plugin status, two are listed as "Unknown Plugin" The buttons offering to research them result in a 404 File Not Found. The buttons link to[[ https://www.mozilla.org/en-US/plugincheck/null]] which comes up with: Whoops! What are you doing here? Did you make a left at that last URL instead of a right? No problem. Unless you want us to deal you in, here are some tips to get you back on your way: If you typed in the address, check your spelling. Could just be a typo. If you followed a link, it’s probably broken. Please contact us and we’ll fix it. If you’re not sure what you’re looking for, start at mozilla.org.

Alla svar (1)

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When I click a Research link, I and sent to a Google results page. When I right-click a Research link and choose Copy Link Location, I get (for example) this: http://www.google.com/search?q=current%20version%20plugin%20Microsoft%20Office%202010

If you right-click and Copy Link Location, what do you get?

Have you changed your default search engine?