[SanderSantema]

Given the required permissions I’d like to read the source code before using it, but that doesn’t seem to be available. Is this correct?

[cropcirclbureau]

It's available here: https://github.com/madprops/grasshopper. The link was in the left sidebar behind some tracking redirect.

[Sujeto]

>behind some tracking redirect

Put there by mozilla btw

[akaij]

You can download the xpi file directly from the versions page (https://addons.mozilla.org/en-US/firefox/addon/grasshopper-u...) and extract it:

  $ file grasshopper_urls-746.xpi 
  grasshopper_urls-746.xpi: Zip archive data, at least v2.0 to extract, compression method=deflate

[Sujeto]

There's a link to the github in the store.