I am heartbroken to read that you won't be developing the AiOS any longer, but I cannot say that I blame you. Today I updated my v56 of FF to v57, and was IMMEDIATELY unhappy with it, since it no longer supports Ajax, which is very important when browsing a XenForo forum, which is the app that Vaping Underground runs on, and I am a daily user of that forum. I immediately did a system restore back to my 11/29 restore point to get v56 back, and left some nasty feedback to Mozilla with my opinion of their lack of ajax support in v57 -- I guess they think we're all tech-luddites who won't know the difference, but have I got news for THEM! Of course when I got v56 back, I immediately felt the lack of my trusty AiOS, and browsed around till I found your site and the reasons you won't be developing it any longer... and found a way to get it reinstalled, because I definitely won't be installing v57 of FF anytime soon, IF EVER, with the lack of Ajax support.
I'll miss your work, in future when I have no choice but to update FF. But since you're moving to Chrome, maybe you could develop something similar -- if I have to use a FF without Ajax, I'll stick with Chrome exclusively, because Chrome doesn't support Ajax in the XenForo software either, which is the only reason I've been using FF at all -- for that forum.