Which physical directory is the firefox's localstorage directory?

Question

There are three browsers installed on my local pc :firefox,chrome,opera.

find /  -name  'Local Storage'
/home/debian8/.config/opera/Local Storage
/home/debian8/.config/google-chrome/Default/Local Storage

The physical directory to store data on them can be found with find / -name 'Local Storage' for opera and chrome ,not for firefox.
Which physical directory is the firefox's localstorage directory?

ls /home/debian8/.mozilla/firefox/4qfwwwo5.default/storage
default  permanent  temporary

In order to trace out the physical directory,an array was stored in local storage in firefox this way. 1.to open https;//www.yahoo.com in firefox
2.to store the array with js in firebug--console

var arrDisplay = [0, 1, 1, 1];
localStorage.setItem("menuTitle", arrDisplay);  

ls /home/debian8/.mozilla/firefox/4qfwwwo5.default/storage default permanent temporary

It is most likely in the default directory.

ls /home/debian8/.mozilla/firefox/4qfwwwo5.default/storage/default
https+++www.yahoo.com
ls /home/debian8/.mozilla/firefox/4qfwwwo5.default/storage/default/https+++www.yahoo.com
idb
ls /home/debian8/.mozilla/firefox/4qfwwwo5.default/storage/default/https+++www.yahoo.com/idb
301792106ttes.files   301792106ttes.sqlite-shm
301792106ttes.sqlite  301792106ttes.sqlite-wal
sqlite3  /home/debian8/.mozilla/firefox/4qfwwwo5.default/storage/default/https+++www.yahoo.com/idb/301792106ttes.sqlite-shm
SQLite version 3.8.7.1 2014-10-29 13:59:56
Enter ".help" for usage hints.
sqlite> .table
sqlite> .exit
sqlite3  /home/debian8/.mozilla/firefox/4qfwwwo5.default/storage/default/https+++www.yahoo.com/idb/301792106ttes.sqlite-wal
SQLite version 3.8.7.1 2014-10-29 13:59:56
Enter ".help" for usage hints.
sqlite> .table
sqlite> .exit
sqlite3  /home/debian8/.mozilla/firefox/4qfwwwo5.default/storage/default/https+++www.yahoo.com/idb/301792106ttes.sqlite
SQLite version 3.8.7.1 2014-10-29 13:59:56
Enter ".help" for usage hints.
sqlite> .table
database            index_data          object_store        unique_index_data 

file object_data object_store_index sqlite> select * from database; test|https://www.yahoo.com|1|1473647521683690|0|49152 sqlite> select * from index_data; sqlite> select * from object_store; sqlite> select * from unique_index_data; sqlite> select * from file; sqlite> select * from object_data; sqlite> select * from object_store_index;

No clue about the menuTitle.

ls /home/debian8/.mozilla/firefox/4qfwwwo5.default/storage/permanent
chrome  indexeddb+++fx-devtools  moz-safe-about+home

It is most likely the indexeddb+++fx-devtools directory.

ls /home/debian8/.mozilla/firefox/4qfwwwo5.default/storage/permanent/indexeddb+++fx-devtools
idb
ls /home/debian8/.mozilla/firefox/4qfwwwo5.default/storage/permanent/indexeddb+++fx-devtools/idb
478967115deegvatroootlss--cans.files  478967115deegvatroootlss--cans.sqlite
sqlite3  /home/debian8/.mozilla/firefox/4qfwwwo5.default/storage/permanent/indexeddb+++fx-devtools/idb/478967115deegvatroootlss--cans.sqlite
SQLite version 3.8.7.1 2014-10-29 13:59:56
Enter ".help" for usage hints.
sqlite> .table
database            index_data          object_store          unique_index_data  file     object_data         object_store_index
sqlite> select * from database;
devtools-async-storage|indexeddb://fx-devtools|1|1475141158242996|0|49152
sqlite> select * from  object_store;
1|0|keyvaluepairs|

Where the menuTitle was stored in firefox's installed directory?

Answer 1

In modern Firefox, localStorage data is stored in webappsstore.sqlite^Doc, which you can find in your profile folder.
In your case it looks like you want:

/home/debian8/.mozilla/firefox/4qfwwwo5.default/webappsstore.sqlite

---

The /storage/default/... folders are for Indexed DB files -- which is a different beastie than localStorage.