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Opening messenger was not a problem in my firefox. But recently i cannot access my messenger anymore in firefox. Everytime I try to open messenger it crashes. But I can use messenger in private window. Can please someone give me a solution for this problem.

The Dismissed Suggestions > the "Restore" button (circled on the attachment) is not working (grayed out). It behaves the same in normal and private browsing. What could be the problem? Thank you