Well the storage size can be large but you can’t get all that into the browsers memory.
Browser memory is based on the version of the browser 32 bit or 64 bit and depends on other things running at the same time and whether its running in a window or a tab.
2GB is typically considered the limit per tab at which time you are certain to crash a browser. If you are targeting a mobile browser it is much less, but again dependent on which device.
Your project size is important as you don’t want to crash the browser but more important is the FPS and the scenes’ ability to respond/redraw. If you initial scene load is small, you can unload and load as much as you want, but you have to manage that process.
You will want to start by reading here: https://www.soft8soft.com/docs/manual/en/introduction/Performance-Bottlenecks.html#large_binary_textures
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