LaunchTile by Stefan Dietz

* Open the LaunchTile window with Ctrl+Q and start searching
* Results can be navigated using the keyboard (arrow keys + enter)
* Bookmarklets are detected as such and run in the context of the currently open tab
* Additionally, larger JavaScript snippets can be managed on the options page
* Initially, without search query, the most recently created bookmarks are shown
* Dark and light theme, automatically toggled by system preferences

To change the hotkey, open about:addons, click the cogwheel symbol, choose "Manage Extension Shortcuts" and look for LaunchTile.