SP 52341: Enable “Warn me when sites try to install add-ons” option in Firefox

Symptom: Firefox does not give any warning when a website attempts to install an add-on.
Resolution: This change will modify the Firefox settings to enable the “Warn me when sites try to install add-ons” option in “Tools => Options => Security”.
Additional Information: For this change to take effect, you must twice consecutively start and exit Firefox.
Category: Firefox

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  5. Cannot install themes or extensions in Firefox

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