The addon can be downloaded from the AMO: https://addons.mozilla.org/en-US/firefox/addon/grabby/
The latest version of the toolkit is available here: https://github.com/pouriap/Grabby-Toolkit/releases/latest
See installation in the main page for more info.
The zip file provided below is for chromium-based browsers which needs to be installed manually.
See browser support in the main page for more info.
Release Notes:
This release fixes an annoying YouTube bug. It appears YouTube has started using service workers for playing videos, which means the Firefox WebExtensions API will not report its tab ID to Grabby. This stupid API is really driving me crazy.
This means when Grabby detects a new YouTube video it has no way of knowing which tab it is playing it. So for now every YouTube video download will appear in every YouTube tab until I can find a better solution.
I should apologize for the very slow speed of development recently. I have been insanely busy at work. I will probably get more free time in the next month or so (fingers crossed).