![]() ![]() Open Mozilla Firefox web browser, type about:config in the address bar and press Enter.But why take such an ardent step when you can temporarily disable Firefox’s blocking feature for a few seconds from the Firefox configuration. One of the ways to unblock certain plug-ins and extension is by editing the nf file in Firefox’s program folder. But sometimes we really need to use these obsolete add-ons to have some work done on certain websites. This is especially true for the time duration when newer version of a plug-in has not been released and the older vulnerable plug-in has been blocked by Firefox. This is done to ensure that no attack or malicious site can take the advantage of known vulnerabilities from these add-ons and plug-ins. So if you have an older version of Adobe Flash or Oracle Java runtime environment installed, Firefox will simply block them from being used. Mozilla take security very seriously and this is why they do not allow any older, obsolete plug-ins or add-ons to work in Firefox by default.
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