Step 1: Install the Firefox web browser (if you haven’t already done so).

Step 2: Install the LeechBlock extension from the Mozilla Add-ons site. Note that you will be asked to restart Firefox to complete the installation.

Step 3: Select LeechBlock > Options… from Firefox’s Tools menu (or the right-click context menu) to specify which sites to block and when.

Step 4: (Optional) Add the LeechBlock button and/or countdown timer to one of Firefox’s toolbars (right-click on the toolbar and select Customize…).

That’s it! You’re good to go.

Visit the examples page for some examples to illustrate the different settings or visit the FAQ page for answers to some frequently asked questions. Note that there’s also a community support forum.