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"Chrome's FileSystem API is disabled in Incognito Mode to avoid leaving traces of activity on someone's device. Sites can check for the availability of the File
by KLejmooo 3y ago
"Chrome's FileSystem API is disabled in Incognito Mode to avoid leaving traces of activity on someone's device. Sites can check for the availability of the FileSystem API and, if they receive an error message, determine that a private session is occurring and give the user a different experience."
- mmsc 3y agoThat’s one way, but they would have had to have used multiple solutions depending on the browser.