WeTransfer - WeTransfer is a free service to send big or small files from A to B.
Cookiebro - With Cookiebro you can manage/filter/block browser cookies that can be used to track you online.
Send Anywhere - Send whatever you want, wherever you want
Cookie Quick Manager - An addon to manage cookies (view, search, create, edit, remove, backup, restore, protect from deletion and much more). Firefox 57+ is supported.
Wormhole.app - Wormhole lets you share files with end-to-end encryption and a link that automatically expires.
EditThisCookie - EditThisCookie is a cookie manager. You can add, delete, edit, search, protect and block cookies!