Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
None in 2009 either
Try it and see. Some will, some won't, it depends on the error that makes native mode disable it. If it's something silly like an obsolete icon tag or empty description, it will usually work in compatibility mode. If the guy left out the engine spec and body mesh it's unlikely to work in any mode.
Be advised if you're creating assets for uploading and you fail to test in native mode, your uploaded content might require compatibility mode and won't work in TS12. It's okay to play in compatibility mode, just make sure you turn it off when testing something that you intend to upload.