They use the Filesystem api.
There is experimental support to stop this detection in chrome now (74 and later). Go to chrome://flags/ and Enable "Filesystem API in Incognito". It should be on by default in an upcoming version.
There is experimental support to stop this detection in chrome now (74 and later). Go to chrome://flags/ and Enable "Filesystem API in Incognito". It should be on by default in an upcoming version.