April 17, 2013, 10:36 AM — Here's how you can install the free Addons Quick Search extension for Firefox.
1. Go to the Addons Quick Search page.
2. Click the Download Now button.
Here's a description of Addons Quick Search:
"Type first letters of add-on name to find them in the list or press Ctrl+↑/↓ to switch between add-ons categories.
Additionally remember and restore last selected item in each list."
For more, see the original article at the link below.