The best of its kind! Rated 5 out of 5 stars
I've used all sorts of addons for instant selection search, and this one beats them all.
It's simple enough not overthinking customization (i'm looking at you Hyperwords), well-designed enough not to make you go through a huge list of items in the context menu, smart enough to use your existing search engines without forcing you to have a redundant second list, it's fast, it's powerful - i abolutely love it.
One suggestion: add a "copy" icon, so when selecting text you're not intending to search, the pop-up doesn't become useless.
Thank you very much != Excelent job!
Wish you could keep developing it...
But hey, i've been through many FF updates and this addon has never stopped working.
Hope it never does!