store temporary files in C:\Users\AppData\Roaming\Mozilla\Firefox\Profiles\pbxeypp5.default-release-1563801646255\storage\default\moz-extension+++7ca4b0a4-1688-4cc9-bd4d-db1deecbddcb\idb\3109085620fsiel.files folder.. This should be mentioned in the documentation and available to all the users whoever add this because it took me sometime to find the path. EE is great .. Also that cache is being cleared automatically after the completion of the download... Sincere thanks and appreciation to the developer.