HTML5 fall back to lowDPI at runtime

Is it possible to fall back to low dpi during app runtime?
For example if avarage fps on mobile browser is too low - switch to low dpi

Lime’s support for high DPI windows does not allow changes at runtime currently, it would require creating a new window.

OpenFL currently matches one stage to one Lime window, which means that if the Lime window is closed then the stage is also shutdown

Perhaps there could be something akin to window.resize but on Flash and native I believe the window DPI cannot be changed, similarly I think on HTML5 the canvas would have to be destroyed and changed, though this technically could be done in a way that’s transparent to the application

Technically you could resize the window to a smaller size and then use CSS to scale it up again regardless of the DPI setting