A Pasteboard browser extension for Firefox. The extension allows you to capture a screenshot of the current page and upload it to Pasteboard. The extension can also upload images from your clipboard.
Chrome Extension : https://chrome.google.com/webstore/detail/pasteboard-image-upload/hkckgcjapgjkboffmeoaaogfdmdhcmig
Chroms Extension source code : https://github.com/JoelBesada/pasteboard-extension