How to Unblock Mozilla Firefox to Use Online Games
With small programs called "extensions" you can give the Web browser new functions and abilities. You can also use these to limit Firefox's capabilities. For instance, you can install extensions that prevent you from visiting certain Web sites or accessing certain types of content. However, you may find from time to time that these extensions have unintended effects. If you mean to block one type of content and another type of content, such as online games, also becomes blocked, you can take steps to reverse the changes.
Instructions
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Launch Firefox, if it is not open already, by clicking "Start, "All Programs," then "Firefox."
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Click "Tools" when Firefox loads, then select the "Add-ons" entry.
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Click the tab entitled "Extensions." Peruse the list of extensions, reading their descriptions. Look for any extension that appears capable of blocking access to certain Web pages.
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Click the add-on that is preventing you from playing online games, then click the "Disable" button.
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Click the "Restart Firefox" button at the top of the "Add-Ons" dialog to complete the process.
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Tips & Warnings
There is also an "Uninstall" button beneath every extension in the list. You can use this button to permanently remove extensions.
You must restart Firefox after modifying extensions for the changes to take effect immediately.