Changed:
- The main script is set to load as soon as the page starts loading, which precedes any requests to YouTube. This change should resolve the issue in which some videos are skipped because they are loaded before the add-on.

Fixed:
- The script is intended to only block videos on the recommended page, but there is an oversight which causes it to remove videos in `/<channel>/videos` also. This means if you navigate to the video tab of a channel, videos there were also blocked. This is an unintended behavior. The issue is resolved by adding a guard to ensure that the script only execute on the recommended page and disable elsewhere.

Improved:
- Before when a DOM has been changed, the extension always scans through the entire document, regardless of where the change occurs. With this update, only those mutated DOM nodes will be scanned, massively improving performance while browsing.