Making big downloads resumable in Firefox

Firefox's default 300-second network timeout setting interferes with resuming large downloads, but changing `network.http.response.timeout` to 0 or a higher value in `about:config` makes big downloads more resumable and stable. The issue appears to stem from Firefox's reliance on connection timeouts rather than `.part` files for resumable downloads, though this behavior remains poorly understood and has been problematic since at least 2005. As an alternative, users can use wget with the `-c` flag, which appears more reliable for resumable downloads.