Web-extension development, debugging and deployment

Thunderbird Add-ons
#1

Hello,

I want to port one of my add-ons ScrollAnywhere to Thunderbird but I’m having hard time to debug the issues.

Also I’m not sure about some basic concepts:

  1. if I open e-mail in a new tab, will be my content script injected into that e-mail? If not, then how do I do that?

  2. how do I debug the content script in an e-mail? I can debug the background script, but I cannot find the debugging window for current tab (F12 doesn’t work).

  3. When is the Thunderbird 63 gonna be released? The Release calendar says: "Thunderbird tracks the ESR schedule column per Thunderbird release info. ". Does this mean that the this upgrade will come with next ESR 68 in July 2019?

Or I’m I here way too soon and the webextension API is nowhere near the finish line?
I can see the bug Get WebExtensions working in Thunderbird is fixed in 63, but the [meta] Add support for WebExtensions is not yet.