Add support for WebGPU on the web browsers that currently do not support it

[kkoreilly]

Describe the feature

Once they sufficiently support it, we will add WebGPU support for these browsers:

• Firefox on macOS, Windows, Linux, and Android
• Safari on macOS and iOS
• Chrome on Linux and Android

Currently, those browsers just use 2D backup image drawers.

See also https://caniuse.com/webgpu, which is useful but not completely representative of sufficient support at this point.

This is an extension of #507 / #1112.

Relevant code

No response