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My add-ons are unable to load cause FF can't rewrite file that it needs?

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hikariwillshine
hikariwillshine
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when i try add a new add on it will download but when it goes to install it says Firefox can not modify the needed file.

when i try add a new add on it will download but when it goes to install it says Firefox can not modify the needed file.

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cor-el
cor-el
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Set the Boolean pref extensions.alwaysUnpack to true on the about:config page.