Android: Downloads are forgotten

Parent: legacy/trac#30854 (moved)

When the app is restarted after downloading a file, the file is not listed in Tor Browser's Downloads list anymore. This is very confusing, especially because the file is still saved in the shared storage.

I suspect this is because private browsing mode doesn't save state (including recent downloads). Because we don't remember what we downloaded, we can't differentiate between our files and other files in the shared storage, so it shows nothing.