Go to https://www.mixamo.com/store/#/search?page=1, make sure you're logged in.
open up chrome console by pressing F12 on your keyboard on the Mixamo webpage. Click on the "Console" tab in the new window (developer console).
Paste in "DownloadMixamoByLouisHong.js" into the console input and return. It'll starting downloading from that page and until the last page.
@DakotaMcCutch Yeah filter settings affects the naming, the one I made doesn't matter what you have as settings (but the version loolo posted in the comment above seems much nicer and quicker; though, not sure if it breaks the service's terms of use); I also included a way to download the assets more easily afterward - https://github.com/ConflictedDev/MixamoAnimationsDownload.