Willpower alone rarely stops you from checking the same distracting site during work hours. A site blocker extension removes the decision entirely by blocking the address in your browser, either all the time or during scheduled focus sessions, so the habit has nowhere to go.
Blocking sites permanently or on a schedule
Most site blockers let you block a website at all times, or only during set hours such as your working day. Scheduling suits people who want access to a site in the evening but not during work, while a permanent block suits sites you want to avoid entirely.
Limiting time instead of blocking completely
Some tools, such as StayFocusd, let you set a daily time limit on a site rather than blocking it outright, so you can still check it briefly before access is cut off. This suits sites you use for legitimate reasons but tend to overuse, like social media or news.
Making the block harder to bypass
A blocker is only useful if it is hard to switch off in the moment. Look for a feature that adds a delay before you can disable it, requires a password, or locks settings during an active focus session, which stops you from turning it off the instant you feel distracted.