To comply with Firefox’s new data collection policy, I added
　data_collection_permissions (required: ["none"])
to manifest.json.

This extension does not collect or send any user data.
No functional changes were made in this update.

in addition to:
1. Prefetching videos you hover over on YouTube, and
2. Prefetching the previous and next videos during playlist playback,

the extension now also:
3. Prefetches the entire playlist list in advance.

The extension implemented:

1. Prefetching videos you hover over on YouTube, and
2. Prefetching the previous and next videos during playlist playback.