Consider filtering Material Symbols -- adds 2.7MB to every page

Attaching a patch we used to slim down this to 800kb.

Just some additional comments on this:
There are four parameters that can be used to size these URLs down. People probably won't need all of them. This module might want to make this configurable? Maybe?

I was able to get the outlined fonts to <300kb with this URL for reference: //fonts.googleapis.com/css2?family=Material+Symbols+Outlined:wght,FILL@100..400,0..1

Yes, I see you have patched the module for your specific use-case. As you say, making it configurable is probably the way to go, otherwise, we would be limiting users' options and flexibility when applying the icons.

I'd be in favor of using the "Most popular" set, and then anyone with other needs could use library overrides.