gallery-dl conf important parts (instagram auth, mangadex extract, etc):

"extractor":
    {
        "path-remove": "\\u0000-\\u001f\\u007f\\u003A",
        },
        
        "instagram":
        {
            "api": "rest",
            "cookies": "/path/to/.mozilla/firefox/cookies.txt",
            "include": "posts",
            "order-files": "asc",
            "order-posts": "asc",
            "previews": false,
            "sleep-request": [6.0, 12.0],
            "videos": true
        },
    },

mangadex chapter extract:

gallery-dl -c /home/kat/gallery-dl.conf -o "lang=en" --chapter-range '141-151' https://mangadex.org

instagram rip:

gallery-dl -c /home/kat/gallery-dl.conf https://instagram.com/p/

photobucket embed rip:

gallery-dl -g "r:https://x.livejournal.com/x.html" > i.txt
# (strip all text but LJ links)
gallery-dl -i i.txt

photobucket embed rip demonstration: