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when I recently upgraded to the latest version I lost some features in my "file" toolbar. How do I get them back? Hoe can I go back to my old version of Firefox?

when I recently upgraded to the latest version I lost some features in my "file" toolbar. How do I get them back? Hoe can I go back to my old version of Firefox?

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What toolbar is it that you lost the features in? What features is it exactly? Have you checked to see if there is a new version of the toolbar available?

Re-enable add-ons that were disabled when updating Firefox