notsponsored — zyluxXD

notsponsored automatically marks and skips sponsored segments on YouTube. It checks SponsorBlock first and can fall back to analyzing English captions locally when no community segment is available.

Features:

• Automatically skips detected sponsor segments
• Provides an Undo button to undo skipped segments
• Marks detected segments on the video timeline.
• Supports SponsorBlock-only, local-only, and local-fallback detection modes.
• Lets you disable scanning for individual channels.
• Includes adjustable start and end trimming for sponsor segments.
• Tracks skipped segments and estimated time saved.
• Can optionally seek YouTube ads to their end.
• Offers optional LLM verification through a OpenAI-compatible provider configured by the user.

The local caption analysis runs entirely inside the browser. The optional LLM processing is disabled by default and requires the user to configure a provider, grant Firefox’s data permissions, and enable it.

The extension works best on videos with usable English captions.