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Why is Metastream plug-in listed when I do a Plug-in Check on what plugins are up to date, I thought it was blocked?

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MetaStream 3 Plugin is listed as a Plugin, Status Unknown when I click on "Check on what plugins are up to date" of the Add-ons Manager. (I think this has just recently started happening.) The three other plugins listed are active and none of the other supposed inactive or blocked ones are listed. The Add-ons Manager does indicate Metastream has been disabled due to security issues. Is this normal or of concern?

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Regardless of if a plugin is disabled or enabled, it will still display on the plugin check.
This is to ensure that if the plugin is enabled the user is running the most current and secure version of that plugin.

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Last time I looked, the Plugin Check site uses JavaScript to discover your plugins. Based on experimenting with my own test page (, I think JavaScript can discover plugins that are marked "Always Activate" and "Ask to Activate" but not the ones marked "Never Activate". Firefox may set vulnerable plugins to "Ask to Activate" rather than "Never Activate" if there is no update available (I'm not quite sure how this is decided).

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That would make sense but when I click on "Check to see if your plugins are up to date", Mainstream is the only plugin on the Plugin Status that is disabled and set to "Never Activate" that is shown. None of the other plugins that are disabled and set to "Never Activate" are shown.

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Can you please take a screenshot of your plugins page?

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Thank you!