How to Block Websites on Firefox

If you use Firefox as your Internet browser and want to block websites from being viewed, you will find that Firefox as a standalone web browser does not have a website blocking feature. However, Firefox supports the use of third-party add-on programs, and BlockSite is a third-party Firefox add-on that you can use to make a list of websites that you want blocked in your browser.

1. Open Firefox and click on the "Tools" menu. Select "Add-ons" and then click "Get Add-ons." 

2. Type "BlockSite" into the search bar and hit "Enter." Click on "Add to Firefox," "Accept and Install," and then "Install Now." If you get a message saying that Firefox needs to restart, click on the "Restart Firefox" tab, or close your browser window and then launch the browser again. 

 3. Go back to the "Tools" menu once your Firefox browser restarts. Then click on "Add-ons" and find BlockSite in your list of Add-ons. Click on the "Options" button.

  
4. Make sure the boxes "Enable BlockSite," "Enable warning messages," and "Enable link removal" are all checked under the "Enable functions" heading. Click the radio button next to "Blacklist."

 5. Click the add button, type or copy the URL of the website you would like to block in the text box, and click "OK."

6. Put a checkbox in the "Enable authentication" box and type in a password if you would like the use of the BlockSite add-on to be password protected. This will make it so users will need to enter the password in order to add, edit or remove websites from the list of blocked websites.