ClearTab от Abdul Basit

Features:

Users can add keywords to be blocked. If a user types a blocked word in a tab, the tab will automatically close.

Users can set a time period for a keyword to be active by going into settings and checking “Follow Schedule” when adding the keyword.

Keywords can be removed by going into settings and clicking on the keyword.

Background music playing on YouTube can be disabled by checking “Disable BDM.”

To prevent users from removing blocked keywords, a master password can be set the first time. Settings can only be changed if the password is entered.