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I know the article is here; can't find it. Upgraded to new 15.0.1 of FF on Acer laptop OS Vista. I go anywhere it wants me to upgrade to new.

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I upgraded to new version of FF on my Acer laptop with OS Vista. When I go to upgrade add-ons etc it tells me I'm using the older version 3.0 and that I need to upgrade to use that add-on. I had this problem on my desktop and I found an article that advised me how to repair that issue. Now, I cannot find the article. I have been searching for over 3 hours. Any suggestions?

I upgraded to new version of FF on my Acer laptop with OS Vista. When I go to upgrade add-ons etc it tells me I'm using the older version 3.0 and that I need to upgrade to use that add-on. I had this problem on my desktop and I found an article that advised me how to repair that issue. Now, I cannot find the article. I have been searching for over 3 hours. Any suggestions?

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