How To Reset or Refresh Firefox Web Browser To Default Settings ?
Step 1: Tap On Stack Icon at the Top Right.
Step 2: Click on little help icon at the bottom of menu.
Step 3: Click on Troubleshooting information .
Step 4: Click on Refresh Firefox .
Step 5: At PopUp Again Click on refresh Firefox .
It will Reset your Firefox to Default Settings .
That's all
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