Vimium - The Hacker's Browser.
RadaeePDF - RadaeePDF is a library for developers who want to render, manipulate, annotate PDF files on Android, iOS and Windows.
hunt-n-peck - Simple vimium/vimperator style navigation for Windows applications based on the UI Automation...
genei.io - AI-generated summaries for any article or research paper.
Tridactyl - Replace Firefox's default control mechanism with one modelled on the one true editor, Vim.
SignRequest for G Suite - Sign yourself or get documents signed Easy, secure, legally binding and free. SignRequest helps you sign online.