Experimental Extensions Gallery, Explained

The Experimental Extensions Gallery is something aimed to replace the extra extensions already in the Editor.
It will work by there only being the core scratch 3 extensions in the beginning; pen, video sensing, animated text, and whatever the other hardware stuff is.
You click a button on the tag selector, then it will open https://snail-ide.com/extensions in a new tab.
When you enter the page, there is a lot of extensions for you to choose from. These extensions are fetched from gallerys outside of Snail IDE. We've asked for permission this time and we can actually add them.
The reason we're doing this is because in Snail IDE's very early days the developer was taking extensions, adding them to Snail IDE, without realizing credit is required.
and also because the current extension library is bloated

When will this be added?

We don't really know yet.
I suck at some of the things scratch uses internally which will make development take longer.
But even then, the Experimental Extensions Gallery is low-priority and we're currently working on a ton of things besides the new gallery.