Reset Safari to default settings

From https://www.macissues.com/2015/06/22/how-to-fully-reset-safari-on-your-mac/

Remove Safari’s configuration folder:

1. Open the Go menu in the OS X Finder
2. Hold the Option key and choose the Library option that appears
3. Move the “Safari” folder in here to your desktop

Remove Safari’s window state:

1. Open the Library > Saved Application State folder
2. Locate the “com.apple.Safari.savedState” folder
3. Move this folder to the trash

Remove Safari’s application caches:

1. Open the Library > Caches folder
2. Locate all folders that begin with “com.apple.Safari”
3. Move these folders to the trash.

Remove Safari Cookies configurations:

1. Open the Library > Cookies folder
2. Remove the file called “com.apple.Safari.SafeBrowsing.binarycookies”

Remove Safari’s preferences:

1. Open the Library > Preferences folder
2. Remove any file that begins with “com.apple.Safari”

Remove user plug-ins:

1. Go to the Library > Internet Plug-Ins folder

• Move all items from this folder to your Desktop (or elsewhere)