Where is chrome extension's 'chrome.storage.local' data saved?

google-chrome google-chrome-extension local-storage

For Windows, you can find different data related to your extension [extension_id] at these places

C:\Users\[user_name]\AppData\Local\Google\Chrome\User Data\Default\Local Extension Settings\[extension_id]

C:\Users\[user_name]\AppData\Local\Google\Chrome\User Data\Default\Sync Extension Settings\[extension_id]

C:\Users\[user_name]\AppData\Local\Google\Chrome\User Data\Default\IndexedDB\chrome-extension_[extension_id]

want to checkout chrome.storage data

open developer tools pointing your background page
type command
chrome.storage.sync.get(null, function (data) { console.info(data) });
or
chrome.storage.local.get(null, function (data) { console.info(data) });

google-chrome google-chrome-extension local-storage

For Firefox which now use the same format as Chrome for addon they are saved here:

C:\Users\Marc\AppData\Roaming\Mozilla\Firefox\Profiles\x5jztslz.default\browser-extension-data\

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