Block it when you spend too much time on it.

• You can download from Chrome Web Store
• Or use the zip version Latest Release

1. Visit chrome://extensions in your browser (or open up the Chrome menu by clicking the icon to the far right of the Omnibox: The menu's icon is three horizontal bars. and select Extensions under the Tools menu to get to the same place).
2. Ensure that the Developer mode checkbox in the top right-hand corner is checked.
3. Click Load unpacked extension… to pop up a file-selection dialog.
4. Navigate to the directory in which your extension files live, and select it.

1. Set the Daily Quota (how many hours you should spend on V2EX every day).
2. Wait to be blocked.