The info in the Wiki on FamilySearch may be useful -

https://www.familysearch.org/wiki/en/New_Jersey_Court_Record...

1704-1947: Courts of Common Pleas have recorded civil cases such as marriages, naturalizations, name changes, exemptions from military duty, lunacy cases, tavern licenses, insolvency cases, old-age assistance, manumissions, settlement of boundary disputes, and child support and custody. They also handled appeals from justices of the peace. These county courts were replaced by the superior court.

The state archives has the original loose papers and tavern petitions for some counties and microfilm copies of the records for other counties. Some of these records are also on film at the Family History Library. Tavern petitions are valuable because they show the signatures of people in the community who approved the license.