Bypass FileCrypt and get the original link! Try this version first. If this script shows a "2" in the page and doesn't redirect to the final site, then remove it and try Bypass FileCrypt (XHR)
Tested and working on Firefox with GreaseMonkey, Firefox for Android v68 with GreaseMonkey and Firefox Nightly for Android v83 with ViolentMonkey.
The new function that loads all the links from a container at once has been tested only in Firefox with GreaseMonkey. If it doesn't work, just click on the encrypted links one by one and they will still be decrypted.