This means that the browser gives an accurate representation of file size with the progress bar. I understand the browser doesn't know the future. It can only estimate how long the download will last.

It will display the app’s name and icon, a circular progress bar, the package size, the download progress as a percentage, and a button to open the app. Google started testing a new Download ...

Google introduced the squiggly playback progress bar for the media controls in Android 13 ... progress bars used to represent download progress and file transfer progress, it could be one of ...

Google is tuning the wire-free transfer system with Material Design 3 progress bars when sending on-device files using Quick Share. Android Police spotted this minor change and we’re also seeing ...