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I have installed Mozilla Firefox and some websites could not be verified - Dangerous Websites Blocker, Safe Money, Virtual Keyboard, Fi

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I have installed Mozilla Firefox and some websites could not be verified - Dangerous Websites Blocker, Safe Money, Virtual Keyboard, FirefixTab, YahooToolsProtected. What does this mean? Does Mozilla Firefox install other extensions? What do I do?

I have installed Mozilla Firefox and some websites could not be verified - Dangerous Websites Blocker, Safe Money, Virtual Keyboard, FirefixTab, YahooToolsProtected. What does this mean? Does Mozilla Firefox install other extensions? What do I do?

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The Firefox installer from Mozilla.org contains only Firefox. Nothing else.

Extensions are options you install into Firefox, They can be removed at will. Plugins are from programs that Firefox finds already on your system. The only way to remove a plugin is to remove its program from your system.