siteblocker
nounUK /ˈsaɪtˌblɒkə/
US /ˈsaɪtˌblɑːkər/
A tool that stops you from opening certain websites.
My dad put a siteblocker on the computer so I can't play games during homework time.
OTHER MEANINGS
2. Software that keeps ads from showing on web pages.
The siteblocker made the news page load much faster.
3. A person who decides which websites are not allowed at a school or office.
The siteblocker at our school blocked a game site everyone liked.
4. A setting on a phone or tablet that hides certain apps or pages.
She turned on the siteblocker before letting her little brother use the tablet.