The most recent Mozilla Add-ons Blog announced that Firefox will introduce the WebExtensions API and that XUL, XPCOM and XBL would be deprecated. There are a couple of points that I would like to clear up:
Will the WebExtensions API be added to both SeaMonkey and Thunderbird?
Will XUL, XPCOM and XBL be deprecated in SeaMonkey and Thunderbird?
I have an extension being reviewed that works with all 3 of them and would like to know if I’m going to have to create a separate version for Firefox and another for SeaMonkey and Thunderbird.
Can someone please enlighten me. Thank you.