Textarea Backup Localstorage

Main features:
- Actions available (note the transparent object in the top right corner of the textarea).
- Can automatically place previously typed text in textareas.
- Can add an unobtrusive menu in the top right corner of textareas
- Can periodically backup typed text
- Storage can expire in specified time
- This extension can be disabled in specified or protected sites.

This extension is based on the UserJS script created by Frenzie. Swding converts it to extension.