Mozilla, creator of the Firefox web browser, and Seneca have updated Thimble, an online web editing tool first launched in 2012.
The update is meant to make Thimble a better platform for teaching and learning how to edit websites. Professor David Humphrey had the idea about two years ago to make the previous version of Thimble more robust, so users wouldn't outgrow it.
The result is a new version, created with the help of Seneca's Centre for Development of Open Technology, that includes enhanced features including the ability to work on several web pages at the same time.
An article by PC World includes a overview of the Thimble update.