This article tells how to clear history and cache from Mozilla Firefox. You can use the shortcut keyboard or with Mozilla Interface
I. Using Alternative Button
Step 1. Press button Ctrl + Shift + Del
Time range to clear "everything", and "Clear Now"
II. Using Firefox Interface
Step 1. Click button on right top side panel Mozzila, and choose "Options".
Step 2. Select Privacy & Security - cookies and Site Data - Clear data
Step 3. Tick as this image below "Clear"
III. Refresh Firefox
Step 1. Click button on right top side panel Mozzila, click button "Help", and click "troubleshooting information"
Step 2. Click refresh Firefox, and click Finish
Note : if you use step 2, your setup printer margin will be back to default. If you want setup it back, you can click menu - print - and follow this
