Sleazy Fork is available in English.
Load all favorites to the page and save it, export as JSON data or just copy the textbox contents. Works on exhentai and e-hentai.
< Отзив за Sadpanda Save/Export All Favorites
I don't think its a good idea to add an import feature to this script.
Adding it to x/favorites-scrape (that I linked in the description) would be a much better idea.
Don't expect anything soon.
Thanks :)
Really I like this script, can you make import too?