Rated 1 out of 5 stars
I made some sort of replacement to WikiLook: https://addons.mozilla.org/en-US/firefox/addon/otheraddon/ . If you select a word and press Ctrl+Shift+1 it will open a Wikipedia layover and if you press Ctrl+Shift+2 it will open Wiktionary; pressing Ctrl+Shift+` or pressing the X button closes the layover. It also adds useful search buttons to the taskbar because I didn't like having to select from the drop down menu every time I wanted to use a different search engine. Let me know if you see any gaping bugs.
(Note, my rating is because it no longer works, when it did, it was great)