How can I inspect page resources in Firefox?

In Chromium / Chrome I can use "Inspect element" to view a list of the current page's resources, including JS, images, videos. Basically, all files that have been downloaded in service of that page.

When I "Inspect element" in Firefox I can't find an equivalent. Am I missing it, or is there another way to access the list of files?

1. From the Tools menu, pick Page Info
2. In the Page Info window, select the Media tab

...the list of files downloaded for that page will appear under the Media tab.