User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9b4pre) Gecko/2008020604 Minefield/3.0b4pre Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9b4pre) Gecko/2008020604 Minefield/3.0b4pre When searching for add-ons in the add-on manager, the lick "see all results" substitutes a space with %20 Reproducible: Always Steps to Reproduce: 1. Open up Add-ons manager 2. Click Get Add-ons tab 3. Search for add-on with a space in the name, e.g. Mr Tech 4. Click "See all results link" 5. When the new tab opens in Minefield/Firefox no results will be shown, the value in the "Search Add-ons" textbox on this page will be, mr%20tech, with the URL - "https://addons.mozilla.org/en-US/firefox/search?q=mr%2520tech" Actual Results: No results for "Mr Tech" as %20 replaces the space between Mr and Tech Expected Results: List of add-ons matching the search criteria - "Mr Tech"