Frequently Asked Questions

This page lists frequently asked questions related to the Scratch Addons extension and project.

What is Scratch Addons?

Scratch Addons is an “all-in-one” browser extension for the Scratch website and project editor. It provides features and themes (called addons internally), both for the Scratch website and the project editor. Scratch Addons' mission is to combine all existing Scratch extensions, userscripts and userstyles, developed by several members of the Scratch community, into a single easy-to-access place, while still letting users choose which ones to enable.

What is an “addon”, exactly?

An addon is similar to an extension or a userscript, but they use special APIs provided by the Scratch Addons extension. These APIs allow addons to run scripts on a Scratch page (userscripts), run scripts on the background (persistent scripts), or apply styles to the Scratch website (userstyles).

Userscripts and persistent scripts can use the addon.* JavaScript APIs, which allow them to obtain Scratch-related information (for example, get the current logged in user) and also use extension APIs (like sending notifications).

If everything is an addon, then what does Scratch Addons do?

By itself, Scratch Addons is just an addon loader. Its main tasks are:

Is Scratch Addons safe? How can I report a security vulnerability?

Scratch Addons should not have any security issues/vulnerability in its most recent version, found in the Chrome Web Store and They have been verified by reviewers on contributors of Scratch Addons and by the extension stores.

If you happen to find a security vulnerability please contact World_Languages privately by emailing worldxlanguages (at) If you don’t get a response within 48 hours, please create an issue here.

You can either read our security policy, or check our advisories that we have published.

Will my account be safe when using Scratch Addons?

Scratch Addons doesn’t use your account credentials to essentially work. In fact, you can be logged out from Scratch, and Scratch Addons will still work. Scratch Addons will only send requests based on the cookies that you have, which is supplied by the browser for each request, so some addons like Scratch Messaging won’t work when you are logging in, but it won’t affect other parts of the extension.

Addons on Scratch Addons also have been audited by multiple contributors on the repository, so no-one can just slip some malicious code under our eyes.

Can I tell people about Scratch Addons on Scratch?

You can’t, and please don’t. There is a policy that forbids advertising browser extensions/userscripts here. You may, however, use different methods to tell your friends about Scratch Addons.

How can I contribute to Scratch Addons?

Firstly, thank you for your interest of contributing to Scratch Addons. We appreciate your interest and your later contributions.

As an open-source project, we welcome any kind of contributions. You don’t even need to ask us or to have a certain rank. Anyone is welcome. There’s even a chance that you don’t even realize that you have contributed to the project!

Anyway, back to the point. You can contribute in many ways, and some of it is really easy.

How can I create my own addon?

Read more about how to create an addon on Scratch Addons here.

How can I put my name on the contributors page?

Please read and follow the instruction of [this issue]({{ site.contributors_issue }}) in order to have your name on said page.

How can I remove my name from the contributors page?

If you don’t want your name to be on the page, please tell us by creating an issue on our contributors repository, or by other means of contact. We’re sorry for the inconvenience.

What can I do if I find a problem?

You can tell us using one of these methods.

I think you missed a feature. What can I do?

If you think a feature is missing, or you want to suggest an addon to the extension, or you have a good idea, tell us by following one of the methods mentioned above.

Where can I discuss about Scratch Addons?

You can do it on our Discussion tab or our Discord server. There, you can discuss about it and ask questions if you’re having trouble.

I think Scratch Addons slows down Scratch. What can I do?

Try to turn off addons that you don’t need. Also, check addon notices and warnings to decide which addons should be turned off for better performance.

Are there any consequences for enabling everything?

If you have a mid-end computer, chances are the performance won’t drop significantly. Feel free to go through the list again and turn off addons that you don’t need.

How can you activate the easter egg addons?

To reveal the easter egg addons, do the Konami Code (↑↑↓↓←→←→BA) with your keyboard on the settings page. After that, the easter egg addons will be shown, letting you to activate them.

Some of our easter egg addons are “Cat blocks” and “Semicolon glitch”. Check out the addons tab for a complete list.

I have more questions!

If you have more questions that need answers, you can create a post on our Discussion tab or send a message on our Discord server. Someone will try to answer it for you.