When you first log in to MapBrowser a new "Untitled Project" is automatically created in MapBrowser. Think of this project as a blank canvas – you can search for a location, browse imagery and create measurements just as you would normally do. You can save your project with any relevant name.
Once you save your project, the project name replaces "Untitled Project" in the Layer Manager. Even if you do not save your project, everything you draw on the map is saved automatically in the Layer Manager. If you happen to refresh your browser, you will not lose your work.