我的本地电脑上安装了三个浏览器：firefox,chrome,opera.

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

用于存储数据的物理目录可以通过find / -name’Local Storage’找到opera和chrome,而不是firefox.
哪个物理目录是firefox的localstorage目录？

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

为了追踪物理目录,数组以这种方式存储在firefox的本地存储中.
在Firefox中打开https; // www.yahoo.com
2.将数组与js存储在firebug – console中

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

ls /home/debian8/.mozilla/firefox/4qfwwwo5.default/storage
默认永久暂时

它很可能在默认目录中.

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
源码>从数据库中选择*
测试| https://www.yahoo.com|1|1473647521683690|0|49152
源码> select * from index_data;
源码> select * from object_store;
源码> select * from unique_index_data;
源码>从文件中选择*
源码> select * from object_data;
源码> select * from object_store_index;

没有关于menuTitle的线索.

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

很有可能是indexeddb fx-devtools目录.

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|

menuTitle存储在firefox的安装目录中的哪里？

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