"In Safari, on the top menu go to Safari -> Preferences.
Click the General tab at the top (if it is not already selected.
Next to “Homepage”, type in your preferred website (e.g. Apple)
Click the Extensions tab at the top.
If it is not there, then you can skip to the last step.
In the left column, click on My Personal Homepage (name may be truncated).
Once again, if you don’t see it then you can skip to the last step.
Then to the right of it, click the Uninstall button.
Click the Uninstall button to confirm.
Restart the computer."