Java installed but firefox is saying it is missing

I have tried to search for an answer to my problem but to no joy.
I use a website for work and there is a certain button i click which opens a popup and it says "A plugin is needed to display this content"
I have tried everything to get it to work , uninstalled Firefox, uninstalled all java related files on my computer, restarted computer and installed both again.
Is there anything i can do to get this to work.

Do you have the right things enabled on the Firefox Add-ons part? I do not know the default settings but for Java (both Platform and Deployment Toolkit) there are some options to choose (they are on the right side next to the Java). 
Java Deployment Kit has 2 options "Ask to activate" and "Never activate". 
Java Platform has 3 options: "Ask to activate", "Always activate" and "Never activate". 
If those are set to "Never activate", then that could be the cause of your problem?

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rmbrewer wrote:
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Please mark "Solved" the answer that really solve the problem, to help others with a similar problem.

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Please remember to mark the replies as answers if they help and unmark them if they provide no help. If you have feedback for TechNet Subscriber Support, contact [email protected]

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'''If this reply solves your problem, please click "Solved It" next to this reply when signed-in to the forum.'''

The flash player plugin is correct installed, but firefox keeps asking to install it and then says not possible

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An example of my website is http://www.vangelder.nl/example
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Java installed but firefox is saying it is missing

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