update docs

Author: chunliu

docs/privacy-policy.md

@@ -5,10 +5,10 @@ title: privacy policy
 
 # Privacy Policy for STTF Url Generator Extension
 
-##### Last Update: 21 June, 2020
+##### Last Update: 25 June, 2020
 
-The STTF Url Generator extension does NOT collect, store, transfer or share any of your data or any personal identifiable information either locally or remotely. This extension does NOT sync or send any of your data to any remote server. This extension does NOT run any remote code.
+The STTF Url Generator extension does NOT collect, transfer or share any of your personal data or any personal identifiable information either locally or remotely. This extension does NOT sync or send any of your data to any remote server. This extension does NOT run any remote code.
 
-This extension uses "contextMenus", "clipboardWrite" and "activeTab" permissions of the browser. It does NOT require any other permissions.
+This extension uses "contextMenus", "clipboardWrite", "activeTab" and "storage" permissions of the browser. It does NOT require any other permissions.
 
-This extension does NOT access the storage either locally or remotely.
+This extension uses chrome.storage.local API to store and retrieve its settings. It does NOT sync the settings data to remote server. This extension does NOT access any remote storage.