2 items
Indicate when a link will open in a new tab as you hover over it Some links open in the same tab. Some links open in a new tab. Unfortunately there's no way to know what a link will do until you click it. Hovertab fixes this. Links that open in the current tab retain the standard "pointer finger" icon when you hover over them. Links that open in a new tab will show an informative little arrow when you hover over them. Problem solved.
rating_count is the Chrome Web Store ratings count, not a written-review count.
Media assets
Screenshots and videos on the listing.
Has promo video
Whether the listing includes at least one video.
Languages
Declared language locales.
Developer website
Listing exposes a developer website URL.
Contact email
Listing exposes a contact email.
Keyword in name
Case-insensitive substring match in the name.
Keyword in description
Case-insensitive substring match in the description.
Keyword occurrences in description
Count of case-insensitive occurrences in the description.
Category user-count percentile
Share of same-category extensions with fewer users (null if unknown).
These are transparent listing completeness / keyword signals, not a prediction of Chrome Web Store search ranking.