These files are a way to import and export fields entered in Chrome Scraper extension:
https://chrome.google.com/webstore/detail/scraper/mbigbapnjcgaffohmbkdlecaccepngjd?hl=en
Even when Presets
option allows to save all fields, it is not apparent how to share presets between different installations, this is then a very rough attempt.
After exploring local storage for extension I saw that presets are stored there, so they can be copied and merged as a JSON would be merged:
https://drive.google.com/file/d/1S-kDsoFP4preBD_n265GesKapOctMAII/view?usp=sharing
Or faster: