While scripts found on sites like GitHub or Scribd may appear helpful, they carry significant risks: KhanHack - Chrome Web Store
Take the first hint, try to solve the rest. If you still can't, take the second. This keeps your brain engaged.
While these tools might seem like a shortcut to "Mastery Points," they come with significant drawbacks: Security Risks
The "Best" code is open source. Many random YouTube videos ask you to paste a script into your console. That code can steal your Khan Academy cookies, your Google login, or worse. Stick to Chrome Web Store extensions or verified GitHub repos.
Here are the most common ways this "feature" is currently accessed or mimicked: