get the URL of the last accessed (most recently loaded?) loaded tab in firefox

ff_last_accessed.sh

export opentabs=$(find ~/.mozilla/firefox*/*.default/sessionstore-backups/recovery.jsonlz4);

python3 <<< $'import os, json, lz4.block
f = open(os.environ["opentabs"], "rb")
magic = f.read(8)
jdata = json.loads(lz4.block.decompress(f.read()).decode("utf-8"))
f.close()
last_recent = 0
for win in jdata.get("windows"):
    for tab in win.get("tabs"):
        i = tab.get("index") - 1
        if last_recent < tab.get("lastAccessed"):
            last_recent = tab.get("lastAccessed")
            url = tab.get("entries")[i].get("url")
    print(url)'