Are you sure you want to go to an external site to donate a monetary value?
WARNING: Some countries laws may supersede the payment processors policy such as the GDPR and PayPal. While it is highly appreciated to donate, please check with your countries privacy and identity laws regarding privacy of information first. Use at your utmost discretion.
Unfortunately, the nature of loading an entirely different rendering engine/browser requires that those extra permissions and helpers be installed. There's simply no way to do this using a UserScript.