Yes it was, thanks :^)
The reason why I asked this was simply that I was unable to find a reason to
use this extension, and I personally hate bloat on my computer. I'm using
only carefully selected, and tested software to ensure they're best in
category and they does what they claim to. I tested Linterna Magica amongst
other plugins, and I can categorize it as a bloat (no offense here).
Personally for YouTube, I'm using SMTube which technically does what your
plugin, except that it does it without the need for a web browser. Therefore
it's a LOT faster solution, and since Abrowser(Firefox) is causing several
times a CPU load surpassing 100% on a multi-core model, despite having a
high-end system, not mentioning the hassle of playing videos in a web browser
(opening a new window, searching for a video, wait until it loads, etc.),
that the video is cached from the begining when I switch to fullscreen
(YouTube automatically switches from 360p to 720p for better visual quality),
and most importantly, that I need to move the mouse cursor every ten minutes,
'cause the screen is going to dim. If you haven't already, I recommend to try
it if you haven't already (you will be surprised how great a YouTube
experience could be).
So basically your extension is just an eyecandy for a marginal userbase, or
for those whose into these things (unfortunatelly, I'm not). This is what I
wanted to know; thanks again.