Developer reply by Tomasz Lewoc
Rated 4 out of 5 stars
At least it works truly fine so far. But it doesn't really sync with the tb-tasks, just adds google tasks as an extra tasks-field. I can live with that, but I'm really missing the possibility of adding and editing subtasks (google has it) and a possibility to view all tasks at once not only one specific list (maybe like "all" in the dropdown-menu). 5 stars if it improves on that. thanks for this add-on.
Edit: After the response I tried out more intensly and found out the trick with ctrl+arrows. That's worth a lot. 4/5 now. Thanks again.
You can create subtasks, just like in Google's web interface. Just choose "rearrange tasks" from the drop-down menu next to the sync button.
The add-on doesn't sync with Lightning's tasks because they differ greatly from Google in what fields tasks have and how they are stored.
To create your own collections, you must have a Mozilla Add-ons account.