We treat two areas of the ScreenSteps service differently for browser support.
For the Public area, or the site where you send your end users to view your content, we support all major browsers. You should not run into an instance where someone can't view your content, even if they are on older browsers. There are two features that require IE 11 or later to display and work properly - Foldable sections and checklists. In older versions of IE they will not function as intended.
For the Admin area where you manage and edit content we support IE 11, Firefox, Chrome and Safari.