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Find answers to frequently-asked questions about Amplitude.
FAQ: Why are events failing to ingest for users on Firefox?
FAQ: Retention analysis in Amplitude
FAQ: Behavioral cohorts in Amplitude
FAQ: Trouble logging into Amplitude
FAQ: New orgs cannot open left menu
FAQ: What's the difference between hiding, blocking, and deleting an event or property?
FAQ: Funnel Analysis
FAQ: How does the Personas chart calculate clusters?
FAQ: What is the Scholarship Plan?
FAQ: How Amplitude calculates chance to outperform and statistical significance in A/B tests
FAQ: Modify or delete historical data
FAQ: Exporting .CSV files
FAQ: Event Segmentation
FAQ: Apple’s iOS 14 IDFA Changes
FAQ: Segment <> Amplitude integration
FAQ: How to instrument Amplitude on 3rd party website builders
FAQ: Can I export all raw data for this chart/event?
FAQ: How to perform analyses for users that performed Event A or Event B
FAQ: Behavioral Cohorts - How do I Identify Users Who Lack User Properties or Did Not Perform Events?
FAQ User Session chart showing many "zero length sessions"
FAQ How to Block and Filter out Internal Users
FAQ: Why is this user counted under '(none)' or an unexpected value?