Installed some extensions to improve browser 

Click&Clean: Deletes typed URLs, Cache, Cookies, your Download and Browsing History...instantly, with just 1-click on Click&Clean button! Extension for Firefox that will help you to:
- Delete your browsing history
- Clear records from your download history
- Remove cookies and Empty cache
- Delete temporary files
- Remove Flash Local Shared Objects (LSO)
- Delete private data when Firefox closes
- Automatically close all windows/tabs
- Clean up your hard drives and Free up more disk space
- Including secure file deletion
- Using external applications, like CCleaner, Wise Disk Cleaner etc. on Windows or Janitor, BleachBit etc. on Linux