If iframe loads need to be avoided, could we get easy access to add proper <title> and <meta description> tags?

using an image sequence as a texture would be handy, being able to sync up audio and images for a tv or movie screen.

The Turntable or "Rotate" button seems to work or not work depending on whether the Play/Pause button has been pressed while the Scene was in Rotation mode. Perhaps anytime the scene has been Paused; and someone presses the "Rotate" button again, it should start rotating and automatically switch the Play/pause button as well.

Many web authoring apps have checkbox in export dialog box called "open in browser after export".
So exported html will automatically open in default browser.
Is this doable with Blender?

Maybe even a prerendered mp4-video instead 3D content when 3D is not supported.
There are quite a lot of low-end smartphones and tablets that can't play 3D in browser but can play html5 video.

You would still export from the export menu, or if you were feeling really original instead of having a render button you would just have an "export" button which would actually just create the HTML or corresponding JSON file instead, this could respect the "output" field like other renderers do, allowing a quick explicit way to re-export to the same file. At the most this could call the default system browser on the created file if the user intended so. [smiling-sunglasses]