In this segment we are going to "Reset Safari Web Browser Without Opening"
Step 1 : Close all Open Applications
Navigate to Apple Icon from Top Left Corner. Click on Apple Icon and then click on Force Quit.
After that Force Quit all the open Applications except Finder.
Step 2 : Open ~/Library
Now, Click Go Select Go to folder Type: ~/Library. Then Hit Enter
Look for Cookies, Cache and Safari. Select them all and Move to Trash.
Navigate to Folder Saved Application State. Search for com.apple.Safari.savedState and Move to Trash.
Then Close the window.
Step 3 : Open Terminal
Now, Open Terminal.
Copy and Paste all these commands at once in Terminal.
These commands will fully wipe out all of your old Safari settings.
Restart the Mac and Open Safari again.