Test browser storages

Test IndexedDB

indexedDB.databases().then(function(res){console.log(res)}) 
	
https://developer.mozilla.org/ru/docs/Web/API/IndexedDB_API/Using_IndexedDB
https://developer.mozilla.org/en-US/docs/Web/API/IndexedDB_API

https://developer.mozilla.org/en-US/docs/Web/API/IDBFactory/databases
https://developer.mozilla.org/en-US/docs/Web/API/IDBDatabase/close
https://developer.mozilla.org/en-US/docs/Web/API/IDBObjectStore
https://developer.mozilla.org/en-US/docs/Web/API/IDBObjectStore/clear
https://developer.mozilla.org/en-US/docs/Web/API/IDBDatabase/deleteObjectStore

https://developer.mozilla.org/en-US/docs/Web/API/IDBCursor/update
https://developer.mozilla.org/en-US/docs/Web/API/IDBKeyRange

https://developer.mozilla.org/en-US/docs/Web/API/IDBIndex/multiEntry

https://learn.javascript.ru/indexeddb

https://metanit.com/web/javascript/23.2.php

http://habrahabr.ru/post/213515/

https://www.w3.org/TR/IndexedDB/

Firefox's IndexedDB .sqlite files are located at 
C:\Users\{USER}\AppData\Roaming\Mozilla\Firefox\Profiles\{PROFILE}
%AppData%\Roaming\Mozilla\Firefox\Profiles\your profile id\indexedDB\domain

Chrome
In windows, the file is located here:
C:\Users[USER_NAME]\AppData\Local\Google\Chrome\User Data\Default\IndexedDB
%AppData%\Local\Google\Chrome\User Data\Default

IE
%AppData%\Local\Microsoft\Internet Explorer\Indexed DB\Internet.edb