Welcome to this forum and congratulations to developing your first (I guess?) extension.
However, your website you link to is down or so. I got an error from your hoster, as it seems.
But I found it on AMO: https://addons.mozilla.org/firefox/addon/focusjump/
So I like the basic idea (if I get it correctly), I have to say.
However, does it only work for Google? You should definitively add support for more search engines.
(And I don’t get your user count thing there… This is no crowdfunding. )
Personally, I’d also publish the source on GitHub or similar.
BTW, next time such announcements may possible be better not to put in the dev category in the forum. I think people usually use the support channel here: https://discourse.mozilla.org/c/add-ons/add-on-support