See: https://github.com/google/dfindexeddb

Google chrome uses its own comparator 'idb_cmp1' which is why regular tools like ldb won't make it. If you want to unpack data from chrome IndexedDB, do:

$ sudo apt install libsnappy-dev

Then:

pip install 'dfindexeddb[plugins]'

dfindexeddb db -s SOURCE --format chrome --use_manifest