Severity: wishlist

Set porcupine as your default web browser. When you click a link,
porcupine will copy the URL to your clipboard and notify you about this.
Or it can run a command of your choice. This way you'll never
accidentally open a link you don't want to, and you can easily choose
which browser to load it in.

Source: https://github.com/micahflee/porcupine