Neat little extension, the search results are much better without the recommended nonsense nobody asked for.
However, two things that could be improved crossed my mind:
1. The 'hide playlist' option. When hiding playlists is on and you filter for playlists, the extension enters an infinite loop. Would it be possible to make an if statement to check the applied filters?
2. Search in playlists function. Say I have a playlist open and want to search for a specific video within the playlist, would that be possible to make? Ctrl+F is limited to what is currently loaded on the page...