You're absolutely right.

When opening a jpg, it literally says "importing pic.jpg" when opening a jpg

What about microplastics?

Not until Netcraft confirms.

Unfortunately it's the only viable (if only somewhat) non-blink web engine that is designed to be easily embedded in other software.

I don't know why, but architecturally Mozilla has gone down the route of making gecko tied to Firefox, and not easily embeddable.